Valve device

A valve device, comprising:

• a valve chamber to be supplied with fluid;
• a valve seat surface provided inside the valve chamber;
• a valve element mounted at a position overlapping with an opening part provided in the valve seat surface;
• a valve element drive member that moves the valve element along the valve seat surface;
• and
• a drive source that drives the valve element drive member,
• wherein
• the valve element includes at least one concave part provided on an abutment surface abutting against the valve seat surface, and at least one through hole opening in a bottom surface of the at least one concave part,
• in the at least one concave part, a width in a first direction being a movement direction of the valve element by the valve element drive member is smaller than a width in a second direction orthogonal to the first direction,
• the valve element includes a flow channel groove formed on an opposite surface facing an opposite side of the abutment surface, and the at least one through hole opens in a bottom surface of the flow channel groove,
• the valve element is formed with a fitting concave part that fits with the valve element drive member, and
• the fitting concave part is continuous to the flow channel groove.