An object is to provide an electric compressor with which the need to process an external surface of a housing can be eliminated, making it possible to reduce time and labor involved in processing, and with which a protection member can easily be mounted to the external surface of the housing, and to provide a manufacturing method of an electric compressor. An electric compressor (1) comprises: a housing (2) having a curved external surface; an electric terminal (3) provided at the external surface of the housing; pin-like bolts (4a and 4b) that protrude from the external surface of the housing in a normal direction of the external surface; and a terminal guard (5) in which apertures (7a and 7b) that correspond to the positions and protruding directions of the bolts are formed, and that surrounds the electric terminal with the bolts being inserted into the apertures.