diff --git a/amicleaner/cli.py b/amicleaner/cli.py
index 0a20acf..e85797a 100755
--- a/amicleaner/cli.py
+++ b/amicleaner/cli.py
@@ -28,6 +28,7 @@ def __init__(self, args):
         self.from_ids = args.from_ids
         self.full_report = args.full_report
         self.force_delete = args.force_delete
+        self.ami_min_days = args.ami_min_days
 
         self.mapping_strategy = {
             "key": self.mapping_key,
@@ -86,7 +87,7 @@ def prepare_candidates(self, candidates_amis=None):
             if not group_name:
                 report["no-tags (excluded)"] = amis
             else:
-                reduced = c.reduce_candidates(amis, self.keep_previous)
+                reduced = c.reduce_candidates(amis, self.keep_previous, self.ami_min_days)
                 if reduced:
                     report[group_name] = reduced
                     candidates.extend(reduced)
@@ -143,6 +144,7 @@ def print_defaults(self):
         print(TERM.green("mapping_values : {0}".format(self.mapping_values)))
         print(TERM.green("excluded_mapping_values : {0}".format(self.excluded_mapping_values)))
         print(TERM.green("keep_previous : {0}".format(self.keep_previous)))
+        print(TERM.green("ami_min_days : {0}".format(self.ami_min_days)))
 
     @staticmethod
     def print_version():
diff --git a/amicleaner/core.py b/amicleaner/core.py
index 792d57c..7949d3c 100644
--- a/amicleaner/core.py
+++ b/amicleaner/core.py
@@ -7,6 +7,7 @@
 import boto3
 from botocore.exceptions import ClientError
 from .resources.models import AMI
+from datetime import datetime
 
 
 class OrphanSnapshotCleaner(object):
@@ -232,7 +233,7 @@ def tags_values_to_string(tags, filters=None):
 
         return ".".join(sorted(tag_values))
 
-    def reduce_candidates(self, mapped_candidates_ami, keep_previous=0):
+    def reduce_candidates(self, mapped_candidates_ami, keep_previous=0, ami_min_days=-1):
 
         """
         Given a array of AMIs to clean this function return a subsequent
@@ -240,6 +241,19 @@ def reduce_candidates(self, mapped_candidates_ami, keep_previous=0):
         time and rotation_strategy param
         """
 
+        result_amis = []
+        result_amis.extend(mapped_candidates_ami)
+
+        if ami_min_days > 0:
+            for ami in mapped_candidates_ami:
+                f_date = datetime.strptime(ami.creation_date, '%Y-%m-%dT%H:%M:%S.%fZ')
+                present = datetime.now()
+                delta = present - f_date
+                if delta.days < ami_min_days:
+                    result_amis.remove(ami)
+
+        mapped_candidates_ami = result_amis
+
         if not keep_previous:
             return mapped_candidates_ami
 
diff --git a/amicleaner/resources/config.py b/amicleaner/resources/config.py
index cb829a8..72da975 100644
--- a/amicleaner/resources/config.py
+++ b/amicleaner/resources/config.py
@@ -27,3 +27,8 @@
 
 
 EXCLUDED_MAPPING_VALUES = []
+
+
+# Number of days amis to keep based on creation date and grouping strategy
+# not including the ami currently running by an ec2 instance
+AMI_MIN_DAYS = -1
diff --git a/amicleaner/utils.py b/amicleaner/utils.py
index 7c5d3bf..6c85196 100644
--- a/amicleaner/utils.py
+++ b/amicleaner/utils.py
@@ -8,7 +8,7 @@
 
 from prettytable import PrettyTable
 
-from .resources.config import KEEP_PREVIOUS
+from .resources.config import KEEP_PREVIOUS, AMI_MIN_DAYS
 
 
 class Printer(object):
@@ -112,6 +112,13 @@ def parse_args(args):
                         action="store_true",
                         help="Check and clean orphaned snapshots")
 
+    parser.add_argument("--ami-min-days",
+                        dest='ami_min_days',
+                        type=int,
+                        default=AMI_MIN_DAYS,
+                        help="Number of days AMI to keep excluding those "
+                             "currently being running")
+
     parsed_args = parser.parse_args(args)
     if parsed_args.mapping_key and not parsed_args.mapping_values:
         print("missing mapping-values\n")
diff --git a/tests/test_cli.py b/tests/test_cli.py
index 3cd11ae..7f3e6fe 100644
--- a/tests/test_cli.py
+++ b/tests/test_cli.py
@@ -66,6 +66,57 @@ def test_deletion():
     assert len(f.fetch_available_amis()) == 0
 
 
+@mock_ec2
+@mock_autoscaling
+def test_deletion_ami_min_days():
+    """ Test deletion methods """
+
+    # creating tests objects
+    first_ami = AMI()
+    first_ami.name = "test-ami"
+    first_ami.id = 'ami-28c2b348'
+    first_ami.creation_date = "2017-11-04T01:35:31.000Z"
+
+    second_ami = AMI()
+    second_ami.name = "test-ami"
+    second_ami.id = 'ami-28c2b349'
+    second_ami.creation_date = "2017-11-04T01:35:31.000Z"
+
+    # constructing dicts
+    amis_dict = dict()
+    amis_dict[first_ami.id] = first_ami
+    amis_dict[second_ami.id] = second_ami
+
+    parser = parse_args(
+        [
+            '--keep-previous', '0',
+            '--ami-min-days', '1',
+            '--mapping-key', 'name',
+            '--mapping-values', 'test-ami']
+    )
+
+    app = App(parser)
+    # testing filter
+    candidates = app.fetch_candidates(amis_dict)
+
+    candidates_tobedeleted = app.prepare_candidates(candidates)
+    assert len(candidates) == 2
+    assert len(candidates_tobedeleted) == 2
+
+    parser = parse_args(
+        [
+            '--keep-previous', '0',
+            '--ami-min-days', '10000',
+            '--mapping-key', 'name',
+            '--mapping-values', 'test-ami']
+    )
+
+    app = App(parser)
+    candidates_tobedeleted2 = app.prepare_candidates(candidates)
+    assert len(candidates) == 2
+    assert len(candidates_tobedeleted2) == 0
+
+
 def test_fetch_candidates():
     # creating tests objects
     first_ami = AMI()
@@ -114,6 +165,7 @@ def test_parse_args_no_args():
     assert parser.mapping_key is None
     assert parser.mapping_values is None
     assert parser.keep_previous is 4
+    assert parser.ami_min_days is -1
 
 
 def test_parse_args():
@@ -129,6 +181,10 @@ def test_parse_args():
     assert parser.mapping_key == "tags"
     assert len(parser.mapping_values) == 2
 
+    parser = parse_args(['--ami-min-days', '10', '--full-report'])
+    assert parser.ami_min_days == 10
+    assert parser.full_report is True
+
 
 def test_print_report():
     assert Printer.print_report({}) is None