Flow path switching device

A flow path switching device for a fluid circuit through which a fluid circulates, the flow path switching device comprising:

• a main body member including a first passage portion and a second passage portion, the first passage portion including a first passage connected to the fluid circuit, the first passage having a groove shape where one surface of the main body member is opened, the second passage portion including a second passage connected to the fluid circuit to communicate with the first passage at a plurality of places, the second passage having a groove shape where another surface of the main body member is opened;
• a drive unit configured to drive a plurality of valve body portions in conjunction to adjust a flow rate of a fluid passing through a communication passage that communicates the first passage and the second passage;
• a first cover member attached to a surface of the first passage portion;
• and
• a second cover member attached to a surface of the second passage portion, wherein
• the first passage portion, the second passage portion, and the drive unit are stacked in this order, and
• the first cover member includes:
• a sealing portion arranged to seal an opened portion of the first passage;
• and
• an opening arranged along an outer edge of the opened portion of the first passage and formed to communicate a side of the main body member to an external side.