A manipulator comprises a first member, a second member that supports the first member such that the first member can rotate about a first rotation axis, a driven portion connected to the first member, which moves on a circumference with respect to the first rotation axis as a center in accordance with a rotation operation of the first member, a flexible member that provides, by a reciprocating operation, a force to drive the driven portion, and a change unit including an arc guide surface, which changes a path of the flexible member in accordance with the rotation operation of the first member. The arc guide surface is arranged to maintain a path length of the flexible member in the reciprocating operation during the rotation operation of the first member.
