Henjo Oliver Richter, (born 24 November 1963 in Hamburg, West Germany) is a guitarist and keyboardist in Gamma Ray, the German power metal band formed by Kai Hansen.

He is a veteran of the German heavy metal scene, but Gamma Ray is his first major band.

However, in the mid-1980s, Henjo was a member of the heavy metal band Rampage, replacing Roland Grapow.

In 2017, it was announced on Gamma Ray's website that the debut album of 'The Unity', which Richter founded together with Michael Ehré, was to be released in spring 2017.

In 2005, Henjo was forced to miss part of Gamma Ray's tour for their album Majestic after injuring himself falling down a set of stairs on the ferry going between Sweden and Finland.