Buckling-restrained brace and method for mounting buckling-restrained brace

A buckling-restrained brace to be mounted on a structure, the buckling-restrained brace comprising:

• a core;
• a restrainer encasing the core from an outer side thereof;
• a stiffening member joined to the core in a state where a part of the stiffening member is disposed inside the restrainer;
• and
• a connector having a first end portion that is pin-joined to the structure and a second end portion that is joined to at least one of the core and the stiffening member,
• wherein an elongated hole is provided in at least one of the core, the stiffening member, and the connector as a position adjustment mechanism configured to adjust a relative position between the connector and at least one of the core and the stiffening member.