Isodon atroruber is a species of flowering plant endemic to Bhutan.

It differs from other species of Isodon in having deep wine red flowers in narrow panicles.

Leaves ovate, acuminate, base rounded-truncate with the lamina slightly decurrent on petiole.

[2] The holotype was collected by Grierson & Long from Dotena in Thimphu district, Bhutan on 5 September 1984.

The type specimen is currently held at the Herbarium, Royal Botanic Garden Edinburgh with catalogue number E00273726.