Filtration device

A filtration device comprising:

• a housing that defines a liquid flow path, the housing comprising:
• a first housing member comprising:
• a top plate portion,
• an annular protruding portion protruding from the top plate portion, and
• an inflow port portion protruding radially outward from the annular protruding portion and defining a liquid inflow port of the liquid flow path, wherein the top plate portion includes a top plate central portion located inward of the annular protruding portion, and a top plate outer edge portion located outward of the annular protruding portion;
• a second housing member comprising:
• a main body plate portion, and
• an outflow port portion protruding from the main body plate portion and defining a liquid outflow port of the liquid flow path, wherein the main body plate portion includes a main body plate central portion that faces the top plate central portion, and a main body plate outer edge portion located outward of the main body plate central portion, and
• a joining member that is located in a gap between the top plate outer edge portion and the main body plate outer edge portion, wherein the joining member joins the first housing member and the second housing member;
• wherein the joining member is in direct contact with the top plate outer edge portion and the joining member is in direct contact the main body plate outer edge portion;
• and
• a filtration sheet that separates the liquid flow path into a flow path upstream side and a flow path downstream side, wherein the filtration sheet is sandwiched by a surface of the annular protruding portion of the first housing member and a surface of the outer edge portion of the second housing member.