To provide an ejaculation promoting device capable of increasing ejaculation efficiency.

An ejaculation promoting device 1 includes: a massage part 42 which is formed like a telescopic tube from a resin and which has a penis insertion part 423b provided on a front surface: a housing body 21 which is formed in a hollow shape with an opened front surface and which internally houses the massage part 42 from the front surface; fixing means 5 for fixing the front side of the massage part 42 to the housing body 21; and driving means for expanding/contracting the massage part 42, which has the front side fixed to the housing body 21 by the fixing means 5, in a longitudinal direction A.