According to one embodiment, a medical device includes: a sheath with a distal end and a proximal end； a housing provided at the proximal end of the sheath； an end effector provided at the distal end of the sheath, the end effector capable of flexing or curving with respect to the sheath； a flexural drive unit including a drive member configured to move relative to the sheath and thereby flex or curve the end effector with respect to the sheath； and a support member mounted inside the housing with a part of the flexural drive unit mounted inside the support member.
