In an electric valve of the invention, the number of components of a motion limiting mechanism relatively to a rotor shaft (3) and a magnetic rotor (52) is reduced, and the precision is increased. The guiding external thread (21b) is integrated with a bracket part at the periphery of the bracket part (21) of the bracket component (2). A driven slider (4) of a guiding internal thread (4a) which isscrewed with one part on the periphery of the guiding external thread is provided. A projection strip (523) is provided at the inner periphery of the magnetic rotor. A fixed lower end limiter (SD1) is integrated with the bracket part at the lower end of the guiding external thread. A fixed upper end limiter (SU1) is integrated with the bracket part at the upper end of the guiding external thread.The driven slider is formed by the synthetic resin which is taken as the elastic component. When the magnetic rotor rotates, the projection strip is used for rotating the driven slider and abutting against the fixed lower end limiter or the fixed upper end limiter thereby restraining the lower position and upper position.