The present disclosure provides an inflatable bed. The inflatable bed includes a tensioning assembly and an air valve, and further includes an upper piece, a bottom piece, a left piece, a right piece, a front piece, and a rear piece which cooperatively form an inflatable cavity. A left ring frame and a right ring frame are respectively provided on the left and right sides of the upper piece. The tensioning assembly is connected to the inner wall of the inflatable cavity. The air valve is communicated with the inflatable cavity. The inflatable bed of the present disclosure is simple in structure and more economical under the premise of preventing turning sideways.