Filtering device and mounting structure

A filtering device comprising:

• a fixing member;
• a filter element including a filtering member having a cylindrical shape and a plate provided at one end of the filtering member;
• a valve provided at the fixing member or the filter element;
• and
• a sealing member having an annular shape and provided at the fixing member or the filter element, wherein
• a first tubular portion including a protruding portion is provided at one of the fixing member and the plate, and a second tubular portion including a recessed portion into which the protruding portion is inserted is provided at the other of the fixing member and the plate,
• the recessed portion has a shape in which a first recessed portion with one end opening at an opening edge of the second tubular portion, and a second recessed portion extending along a circumferential direction are coupled with each other,
• the protruding portion is inserted into the recessed portion when one of the first tubular portion and the second tubular portion is inserted into the other of the first tubular portion and the second tubular portion, and
• when the protruding portion is inserted into the first recessed portion from the opening edge, moved along the first recessed portion, and moved along the second recessed portion, the first tubular portion and the second tubular portion are mounted, the valve is inserted into the first tubular portion and the second tubular portion, and the sealing member is provided between the first tubular portion and the second tubular portion.