The double kidney (Ipimorpha retusa) is a moth of the family Noctuidae.

In the east, the range extends through Turkey, Siberia, Mongolia and China to Korea and Japan.

The habitat consists of damp marshy places.

Forewing olive brown dusted with whitish; inner and outer lines fine, nearly straight, parallel to each other, slightly oblique inwards, and paler edged; subterminal irregular, pale, with a darker shade beyond it; stigmata darker, edged with paler; the reniform on a darker median shade; hindwing fuscous, fringe whitish; — the form gracilis Haw.

Larva pale green; dorsal line broadly, the two subdorsal slenderly, white; the spiracular line white, waved; head green or dark brown.