PURPOSE:To obtain an actuator which is resistant to external wounds by covering the outer periphery of a tubular body by a braided reinforcing structure and further covering with the intrusion part intruding into the stitches of the braided reinforcing structure. CONSTITUTION:The outer periphery of a tubular body 1 made of rubber or rubber elastic material is covered with a braided reinforcing structure 2 made of organic or inorganic high tension fiber. Further, the braided reinforcing structure 2 is covered with a covering member 10 which is made of rubber or rubber elastic material and is relatively thin and has the intrusion part intruding into the stitches of the braided reinforcing structure 2. The both edge opened ports of the tubular body 1, braided reinforcing structure 2, and the covering member 10 are sealing joined, and a connecting hole 4 which communicates to the inside vacant space 6 of the tubular body 1 is formed. With such constitution, an actuator resisting to external wounds can be obtained.
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