To provide a new ejaculation assisting device usable for a long period of time continuously without boring a user even if the user uses it continuously.

This ejaculation assisting device includes: a storage container 5 used by storing it in a storage recessed section formed in a doll or at a private-part position of a part thereof or used independently; and a plurality of genital organ contact members 11 and 21 stored in the storage container 5 and internally formed with genital organ contact portions and/or genital organ contact faces coming into contact with the glans or the penis of the male genital organ. The respective genital organ contact members 11 and 21 are attachable/detachable to/from the inside of the storage container 5, and their placement positions in the storage container 5 are changeable.