A manipulator includes an elongated main portion, a distal end portion, and a bendable portion provided between the main portion and the distal end portion a plurality of linear members that extend from the distal end portion to the main portion via the bendable portion a power generator a plurality of power transmitters that transmit, to proximal ends of the linear members, the power generated by the power generator as linear motion in a longitudinal direction of the main portion and a linear-member relaxing unit that relaxes the linear members in which tension is generated between the distal end portion and the power transmitters by pushing and pulling of the linear members by the linear motion transmitted from the power transmitters.
