PURPOSE: To miniaturize a device, by sliding up a molding frame alternately or simultaneously, when necessary, with the combination of adjacent frames with a driving source such as screw jack or the like and a chain and sprockets.

CONSTITUTION: Respective frames 3a, 3b are parallelly arranged at the upper position of the main frame 1 to place concrete. And only the main frame 1 is separated from the concrete wall face C. And the lock member 8 of both molding frames 3a, 3b is removed and the jack 5 is reversely driven to lower the slider 4. Next, the main frame 1 is fitted to the concrete wall C and the other molding frame 3a is locked to raise the slider 4 while the other molding frame 3b is unlocked. Next, the frame 3b is locked on the main frame 1 at its raised position and the frames 3a, 3b are arranged parallelly and then the next concrete is placed. In this way, the molding frames can be raised and applied alternately or simultaneously.