diff --git a/app/models/post.rb b/app/models/post.rb
index 966cc0d1c..f7193b4c0 100644
--- a/app/models/post.rb
+++ b/app/models/post.rb
@@ -507,6 +507,12 @@ class Post < ApplicationRecord
       when %r{\Ahttps?://(?:[^.]+\.)?yande\.re/(?:image|jpeg|sample)/(?<md5>\h{32})(?:/yande\.re.*|/?\.(?:jpg|png))\z}i
         "https://yande.re/post?tags=md5:#{$~[:md5]}"
 
+      when %r{\Ahttps?://(?:[^.]+\.)?konachan\.com/(?:image|jpeg|sample)/\h{32}/Konachan\.com%20-%20(?<post_id>\d+)}i
+        "https://konachan.com/post/show/#{$~[:post_id]}"
+
+      when %r{\Ahttps?://(?:[^.]+\.)?konachan\.com/(?:image|jpeg|sample)/(?<md5>\h{32})(?:/Konachan\.com%20-%20.*|/?\.(?:jpg|png))\z}i
+        "https://konachan.com/post?tags=md5:#{$~[:md5]}"
+
       # https://gfee_li.artstation.com/projects/XPGOD
       # https://gfee_li.artstation.com/projects/asuka-7
       when %r{\Ahttps?://\w+\.artstation.com/(?:artwork|projects)/(?<project_id>[a-z0-9-]+)\z/}i
diff --git a/test/unit/sources/moebooru_test.rb b/test/unit/sources/moebooru_test.rb
index 1dd41fc08..e0144bb87 100644
--- a/test/unit/sources/moebooru_test.rb
+++ b/test/unit/sources/moebooru_test.rb
@@ -97,7 +97,7 @@ module Sources
     end
 
     context "Post#normalized_source" do
-      should "convert image urls to post urls" do
+      should "convert yande.re image urls to post urls" do
         @post = FactoryBot.build(:post)
 
         @post.source = "https://files.yande.re/image/b66909b940e8d77accab7c9b25aa4dc3/yande.re%20377828.png"
@@ -112,6 +112,19 @@ module Sources
         @post.source = "https://yande.re/jpeg/22577d2344fe694cf47f80563031b3cd.jpg"
         assert_equal("https://yande.re/post?tags=md5:22577d2344fe694cf47f80563031b3cd", @post.normalized_source)
       end
+
+      should "convert konachan.com image urls to post urls" do
+        @post = FactoryBot.build(:post)
+
+        @post.source = "https://konachan.com/image/5d633771614e4bf5c17df19a0f0f333f/Konachan.com%20-%20270807%20black_hair%20bokuden%20clouds%20grass%20landscape%20long_hair%20original%20phone%20rope%20scenic%20seifuku%20skirt%20sky%20summer%20torii%20tree.jpg"
+        assert_equal("https://konachan.com/post/show/270807", @post.normalized_source)
+
+        @post.source = "https://konachan.com/sample/e2e2994bae738ff52fff7f4f50b069d5/Konachan.com%20-%20270803%20sample.jpg"
+        assert_equal("https://konachan.com/post/show/270803", @post.normalized_source)
+
+        @post.source = "https://konachan.com/image/99a3c4f10c327d54486259a74173fc0b.jpg"
+        assert_equal("https://konachan.com/post?tags=md5:99a3c4f10c327d54486259a74173fc0b", @post.normalized_source)
+      end
     end
   end
 end