A tissue collecting tool (1) includes: a main body (2) that is long； an operation part (6) arranged on a proximal end side of the main body (2)； a bag part (3) including a bottom portion (32) and an opening portion (33) and having a part of the opening portion (33) fixed to the main body (2) such that the opening portion (33) is positioned on a further proximal end side than the bottom portion (32)； and a linear member (2) connected to the opening portion (33) and the operation part (6) and raising the opening portion (33) by being moved in a longitudinal direction of the main body (2).
