A bonded structure (14) includes a first member (15), a second member (16), and an adhesive body (17). The second member (16) includes a support (18). The support (18) includes a facing surface and a side surface. The facing surface faces the first member (15). The side surface is inclined outward as viewed from the first member side. The adhesive body (17) is located between the first member (15) and the second member (16). The adhesive body (17) extends from the facing surface to the side surface. The adhesive body (17) has a fillet shape at an end thereof by the side surface. The adhesive body (17) fixes the first member (15) to the second member (16).