To provide a curtain wall which is excellent in heat insulation and prevents a panel from falling in fire emergency.

For the curtain wall, a stringer 1 and a horizontal member 2 of a frame body 3 are turned to aluminum frame bodies for which an aluminum indoor side member 10 and an aluminum outdoor side member 20 are connected by a plurality of stainless steel or iron connection components 30, an outdoor side end 10a of the aluminum indoor side member 10 and an indoor side end 20a of the aluminum outdoor side member 20 are isolated in indoor/outdoor side directions, the plurality of connection components 30 are isolated in the longitudinal direction of the aluminum indoor side member 10 and the aluminum outdoor side member 20, heat insulation is so excellent that heat is not easily transferred to the aluminum indoor side member 10 and the aluminum outdoor side member 20, and the connection members 30 are not melted before the aluminum indoor side member 10 and the aluminum outdoor side member 20 in fire emergency.