An assembled chair includes a chair seat, a chair back, two connectors, two fixing sleeves and two protection cases. The two connectors respectively have two connection portions. The two fixing sleeves are respectively arranged at two opposite sides of the chair back. The two protection cases are respectively fixed at two opposite sides of the chair seat, and the two connectors are respectively arranged in the two protection cases, and the two connection portions emerges from the two protection cases, and the two fixing sleeves respectively sleeve the two connection portions, and at least two fixing members are respectively fixed to the two connection portions, so as to fix the chair back to the chair seat.