Margarinotus taiwanus is a species of clown beetle in the family Histeridae.

[1][2] The type series was collected from Tatachia in Nantou in central Taiwan.

Additional specimens were obtained from Hsinpaiyang (=Xinbaiyang) in Hualien on the east coast of Taiwan.

The dorsal side is finely and rarely punctulate, although the elytra are sometimes more coarsely punctate.

It can be distinguished from all other members of the subgenus Grammostethus by the foretibia not being multidentate.