A McKibben artificial muscle 1, that can be improved durability in an end portion, includes an elastic tube 10 and a braided tube 20. The elastic tube 10 is a hollow-and-cylindrical elastic body. The braided tube 20 that is constituted by circular-knitted threads with a predetermined knitting angle twisted over a periphery of the elastic tube 10 in a movable manner. The braided tube 20 has a contraction portion 21 and a restriction portion 22. The braided tube 20 in the contraction portion 21 is circularly-knitted with a knitting angle that enables the elastic tube to expand radially and contract in a length direction so as to obtain contraction force. The braided tube 20 in the restriction portion 22 is circularly-knitted with a knitting angle that suppresses radial expansion adjacent to an end portion 11 of the elastic tube 10. 展开▼
