The invention discloses a support device arranged between a wind screen and a bottom shell of an air conditioner. The support device comprises a support piece which is in bridge connection between the wind screen and the bottom shell, and the support piece is provided with a first part and a second part. The first part comprises a first end; and the position, a certain distance away from the right side edge of the wind screen, of the first end is fixedly connected to the inner side of the wind screen. The second part comprises a second end; and the second end is fixedly connected to the bottom shell. An angle is formed between the first part and the second part, wherein the angel is so appropriate that the support piece is fixedly connected to the wind screen at an appropriate angle through the first end and fixedly connected to the bottom shell at an appropriate angle through the second end. The support device further comprises a support bridge. The support bridge is of a bridge-shaped structure extending outwards from one side of the support piece. The invention further provides a separated air conditioner. By means of the support device and the separated air conditioner, the suspension position between the bottom shell and the wind screen is in bridge connection; strength of the bottom shell is enhanced; fool prevention can be effectively achieved; and furthermore, squeezing deformation, shrinkage deformation and collapse deformation caused by external force or assembling are prevented.