Riotroopers (or Riot Troopers) (ライオトルーパーRaiotorūpā?) are a para-military force of henchmen from the Kamen Rider Series installment Kamen Rider 555 and the accompanying film Kamen Rider 555: Paradise Lost. They are the first set of "Rider-like" foot soldiers within the franchise. They are also the first case of a Rider originally created for a Kamen Rider movie that was later introduced in the TV series.
- The Shocker Riders were also a team of six Rider-like warriors used by the villain organization near the end of the series. Like the Riotroopers' chest armor, the Shocker Riders' boots and gloves were gold-colored.
- The first evil mass-produced Kamen Rider to appear in the Heisei Era.
- In the S.I.C. Hero Saga Kamen Rider 555: Lost World (the prequel of the movie Paradise Lost), an upgraded version was used by Kyoji Murakami which was called Riotrooper ver. 2.