A joint regulating apparatus configured to regulate a movable range of a joint connecting a first bone part of a wearer with a second bone part of the wearer, comprising: a first member attachable to a part of a body (901, 902) located on a side of the first bone; a second member attachable to a part of the body (901,902) located on a side of the second bone; and a joint mechanism (300, 300') configured to support the first and second members so that the first and second members can swing with respect to each other along a movable direction of the joint in a predetermined regulated swing range, wherein the joint mechanism comprises an elastic mechanism configured to, in case the first and second members tend to swing with respect to each other beyond the swing range, exert an elastic force against the swing; a regulation member (410, 410', 420) directly or indirectly fixed to the first member, the regulation member being configured to regulate the swing range; and a swing member directly or indirectly fixed to the second member, the swing member being configured to come into contact with the regulation member at one of the ends of the swing range and at the other end of the swing range, and the above-described elastic mechanism comprises: an elastic member (333, 730) configured to exert an elastic force, the joint regulating apparatus being characterized in that the elastic mechanism further comprises a displacement member (331, 731) configured to allow the swing member, after the swing member comes into contact with the regulation member, to further swing around a contact point by displacing a swing axis of the swing member, and the elastic member is configured to exert the elastic force by resisting a displacement of the displacement member. a first member attachable to a part of a body (901, 902) located on a side of the first bone; a second member attachable to a part of the body (901,902) located on a side of the second bone; and a joint mechanism (300, 300') configured to support the first and second members so that the first and second members can swing with respect to each other along a movable direction of the joint in a predetermined regulated swing range, wherein the joint mechanism comprises an elastic mechanism configured to, in case the first and second members tend to swing with respect to each other beyond the swing range, exert an elastic force against the swing; a regulation member (410, 410', 420) directly or indirectly fixed to the first member, the regulation member being configured to regulate the swing range; and a swing member directly or indirectly fixed to the second member, the swing member being configured to come into contact with the regulation member at one of the ends of the swing range and at the other end of the swing range, and the above-described elastic mechanism comprises: an elastic member (333, 730) configured to exert an elastic force, the joint regulating apparatus being characterized in that the elastic mechanism further comprises a displacement member (331, 731) configured to allow the swing member, after the swing member comes into contact with the regulation member, to further swing around a contact point by displacing a swing axis of the swing member, and the elastic member is configured to exert the elastic force by resisting a displacement of the displacement member.