ROTATION DETECTING DEVICE AND FIXING STRUCTURE THEREOF

PROBLEM TO BE SOLVED: To simply and inexpensively fix a rotation detecting deice to a case of a rotor.SOLUTION: A fixing structure of a resolver 11 for detecting rotations of a motor 10 includes: a resolver stator 32 inserted in a case 12 of the motor 11, and locked in an insertion direction; a cover body 22 fixed at an insertion port of the case 12, and oppositely disposed to the resolver stator 32; a first contact portion provided on an opposite surface to the cover body 22 of the resolver stator 32, and to which a signal line for outputting a detection signal by the resolver 11 is connected; a second contact portion provided on an opposite surface to the resolver stator 32 of the cover body 22, and to which a signal line for taking out the detection signal to the outside is connected; and a conductive spring 30 arranged between the first contact portion and the second contact portion, electrically connecting the first contact portion and the second contact portion by fixing the cover body 22, and applying energizing force in a direction pressing the resolver stator 32 on the case 12.