diff --git a/docs/plugins/fluentd/input/dummy.md b/docs/plugins/fluentd/input/sample.md
similarity index 52%
rename from docs/plugins/fluentd/input/dummy.md
rename to docs/plugins/fluentd/input/sample.md
index a0a1a95af..05ef5857e 100644
--- a/docs/plugins/fluentd/input/dummy.md
+++ b/docs/plugins/fluentd/input/sample.md
@@ -2,14 +2,11 @@
 
 The in_sample input plugin generates sample events. It is useful for testing, debugging, benchmarking and getting started with Fluentd.
 
-This plugin is the renamed version of in_dummy.
-
 
 | Field | Description | Scheme |
 | ----- | ----------- | ------ |
-| tag | The tag assigned to the generated events | *string  |
-| size | The number of events in the event stream of each emit | *int64  |
-| rate | how many events to generate per second | *int64  |
-| auto_increment_key | generated event will have an auto-incremented key field| *string  |
-| sample | The sample data to be generated. It should be either an array of JSON hashes or a single JSON hash. If it is an array of JSON hashes, the hashes in the array are cycled through in order | *string  |
-
+| tag | The tag of the event. The value is the tag assigned to the generated events. | *string |
+| size | The number of events in the event stream of each emit. | *int64 |
+| rate | It configures how many events to generate per second. | *int64 |
+| auto_increment_key | If specified, each generated event has an auto-incremented key field. | *string |
+| sample | The sample data to be generated. It should be either an array of JSON hashes or a single JSON hash. If it is an array of JSON hashes, the hashes in the array are cycled through in order. | *string |
diff --git a/docs/plugins/fluentd/input/types.md b/docs/plugins/fluentd/input/types.md
index 72449d187..75e3e9b30 100644
--- a/docs/plugins/fluentd/input/types.md
+++ b/docs/plugins/fluentd/input/types.md
@@ -18,4 +18,4 @@ Input defines all available input plugins and their parameters
 | forward | in_forward plugin | *Forward |
 | http | in_http plugin | *Http |
 | tail | in_tail plugin | *Tail |
-| sample| in_sample plugin | *Sample |
+| sample | in_sample plugin | *Sample |