A motor-driven compressor to be mounted to an attachment section of a vehicle includes a fluid compression unit, an electric drive unit for the compression unit and a case. The case has a main body formed from a resin and covering at least the compression unit, and a mounting portion that is provided integrally with the main body and configured to be mounted to the attachment section. The mounting portion has a tubular body provided integrally with the main body and a fastening member inserted into the tubular body for mounting the tubular body to the attachment section. The main body is interposed between the compression unit and the tubular body.