Diplectanum is a genus of monopisthocotylean monogeneans in the family Diplectanidae.

The genus, created by Karl Moriz Diesing,[1] gave its name to the family Diplectanidae.

All its species are parasites of the gill lamellae of teleosts.

[2] The type-species of the genus is Diplectanum aequans (Wagener, 1857).

[3] According to the World Register of Marine Species, many species are included in this genus.