An implant placement device includes a longitudinal axis member having a lumen extending along a longitudinal axis of the longitudinal axis member such that the implant is disposed in a stretched state and an opening formed by communicating with the lumen, a stylet provided in the lumen, a sheath into which the longitudinal axis member is inserted,—an operating part operating the sheath so as to be rotatable around the longitudinal axis, and having a contact surface that is in contact with a part of the implant, which is pushed out of the opening of the longitudinal axis member by the stylet, in a rotational direction around the longitudinal axis in a state where the opening of the longitudinal axis member is located inside the sheath.
