Hyperolius diaphanus is a species of frog in the family Hyperoliidae.

[1][2] Limits of its range are not clear and might extend into the adjacent Burundi and Rwanda.

Phase "j" is normally brownish to green with paired light dorsolateral lines or an hourglass pattern.

[3][4] H. diaphanus is very similar to Hyperolius frontalis but lacks the light triangle on the snout of the latter, has yellow rather than orange-red extremities, and is somewhat smaller.

[3][4] Hyperolius diaphanus is believed to be an arboreal forest species.