To provide a novel ejaculation assisting device being 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 genital organ contact members 11 and 21 stored in a predetermined storage space 8 formed in the storage container 5 and internally formed with genital organ contact portions or genital organ contact faces coming into contact with the glans or the penis of a male genital organ. The plurality of genital organ contact members 11 and 21 are so disposed that the whole or parts thereof move within the storage space 8 according to use conditions such as the external diameter and an insertion angle of the male genital organ in use.