The invention relates to the technical field of tray conveying equipment, in particular to an elevating conveyer. Automatic elevating of a tray can be conveniently achieved, stability and reliability are achieved, the conveying efficiency is ensured, and the conveyer comprises a first conveying line and a second conveying line; the second conveying line is higher than the first conveying line, an elevating mechanism is arranged between the first conveying line and the second conveying line and comprises a bottom plate, the front end and the rear end of the bottom plate are fixedly connected with the first conveying line and the second conveying line correspondingly, the left side and the right side of the bottom plate are each provided with an inverted-U-shaped support, a lifting support is arranged between the two inverted-U-shaped supports, a plurality of electric rollers are arranged on the lifting support, the left side and the right side of the electric rollers are each provided with a limiting stop rod, linear guide rails are arranged on the inner sides of two vertical rods of the two inverted-U-shaped supports, the left side and the right side of the lifting support are in sliding connection with the linear guide rails through sliding blocks, the two sliding blocks on the same side are connected through a middle connecting rod, and each middle connecting rod is connected with a piston rod of a longitudinal drive air cylinder.