Valve device

A valve device, comprising:

• a drive source;
• a valve body driving member, rotated by a driving force from the drive source;
• a valve body, fixed to one end surface of the valve body driving member in an axial direction, and rotating in a circumferential direction integrally with the valve body driving member;
• and
• a valve seat, having a valve seat surface where the valve body is disposed, wherein
• when a surface of the valve body driving member facing the valve body is set as a lower surface of the valve body driving member, a surface of the valve body facing the valve body driving member is set as an upper surface of the valve body, and an end surface that is opposite to the upper surface of the valve body and is disposed on the valve seat surface is set as a lower surface of the valve body,
• fitting parts fitted one another are formed in the lower surface of the valve body driving member and the upper surface of the valve body,
• the valve body has hole parts formed therethrough in the axial direction of the valve body,
• opening parts that are inflow ports or outflow ports of a fluid are formed in the valve seat surface of the valve seat,
• groove parts that are flow channels linking from an outer peripheral surface of the valve body to the hole parts are formed in the upper surface of the valve body, and
• the fitting parts and the groove parts on a side of the valve body have connecting parts that are portions where the fitting parts and the groove parts are formed continuously in the upper surface of the valve body without being separated by other elements constituting the valve body.