A hinge apparatus comprising: a first attachment member to be attached to a housing; a second attachment member to be attached to a door; and first and second links (41, 42), respective basal end portions of the first and the second links (41, 42) rotatably attached to the first attachment member, respective distal end portions of the first and the second links (41, 42) rotatably attached to the second attachment member; wherein the first attachment member, the second attachment member, the first link and the second link constitute a parallel link mechanism, wherein the first attachment member comprises: a base member to be attached to the housing; and a connecting member removably attached to the base member; and wherein the basal end portions of the first and the second links (41, 42) are rotatably attached to the connecting member; a third link that constitutes a parallel link mechanism with the connecting member, the second attachment member, the first link and the second link; wherein a rotation center of a basal end portion of the third link with respect to the connecting member is arranged to form a triangle with rotation centers of the first and the second links (41, 42) with respect to the connecting member, characterised in that the first, the second and the third links (41, 42, 43) are bent in respective intermediate portions; and wherein bent portions of the first, the second and the third links (41, 42, 43) are positioned on a same side with respect to straight lines connecting the respective rotation centers of the respective basal end portions of the first, the second and the third links (41, 42, 43) and the respective rotation centers of the respective distal end portions of the first, the second and the third links (41, 42, 43). a first attachment member to be attached to a housing; a second attachment member to be attached to a door; and first and second links (41, 42), respective basal end portions of the first and the second links (41, 42) rotatably attached to the first attachment member, respective distal end portions of the first and the second links (41, 42) rotatably attached to the second attachment member; wherein the first attachment member, the second attachment member, the first link and the second link constitute a parallel link mechanism, wherein the first attachment member comprises: a base member to be attached to the housing; and a connecting member removably attached to the base member; and wherein the basal end portions of the first and the second links (41, 42) are rotatably attached to the connecting member; a third link that constitutes a parallel link mechanism with the connecting member, the second attachment member, the first link and the second link; wherein a rotation center of a basal end portion of the third link with respect to the connecting member is arranged to form a triangle with rotation centers of the first and the second links (41, 42) with respect to the connecting member, characterised in that the first, the second and the third links (41, 42, 43) are bent in respective intermediate portions; and wherein bent portions of the first, the second and the third links (41, 42, 43) are positioned on a same side with respect to straight lines connecting the respective rotation centers of the respective basal end portions of the first, the second and the third links (41, 42, 43) and the respective rotation centers of the respective distal end portions of the first, the second and the third links (41, 42, 43). a base member to be attached to the housing; and a connecting member removably attached to the base member; and wherein the basal end portions of the first and the second links (41, 42) are rotatably attached to the connecting member; a third link that constitutes a parallel link mechanism with the connecting member, the second attachment member, the first link and the second link; wherein a rotation center of a basal end portion of the third link with respect to the connecting member is arranged to form a triangle with rotation centers of the first and the second links (41, 42) with respect to the connecting member, characterised in that the first, the second and the third links (41, 42, 43) are bent in respective intermediate portions; and wherein bent portions of the first, the second and the third links (41, 42, 43) are positioned on a same side with respect to straight lines connecting the respective rotation centers of the respective basal end portions of the first, the second and the third links (41, 42, 43) and the respective rotation centers of the respective distal end portions of the first, the second and the third links (41, 42, 43).