Provided is an electric stimulation treatment device which is capable of outputting a stimulation voltage more efficiently than a conventional device.A urination disorder treatment device includes a pair of body-surface electrode pads 37, an indifferent electrode pad 39 which is larger in area than a body-surface electrode pad 37 with a relatively larger area, of the pair of body-surface electrode pads 37, and disposed in the vicinity of the pair of body-surface electrode pads 37, and a control portion 48 which supplies an electric signal to the pair of body-surface electrode pads 37 and the indifferent electrode pad 39. The control portion 48 executes any one of the following processing, that is, (1) a stimulation signal is output from one of the pair of body-surface electrode pads 37 with respect to a reference potential set to an average potential of the other of the pair of body-surface electrode pads 37 and the indifferent electrode pad 39, (2) a stimulation signal is output from both of the pair of body-surface electrode pads 37 with respect to a reference potential set to the indifferent electrode pad 39, or (3) a stimulation signal is output from one of the pair of body-surface electrode pads 37 with respect to a reference potential set to the indifferent electrode pad 39.