PROBLEM TO BE SOLVED: To provide the subject device for clipping the leaf parts of seedlings by making all of the leaf parts to have a same height in transplanting culture of a crop, easily movable by simply removing heavy materials for reducing its weight on moving the device and capable of improving working efficiency. SOLUTION: This leaf-cutting device is provided by installing adjusting screws 21, 22 capable of adjusting the up and down position of a cutting edge 45 at the upper parts of the both end parts of the cutting edge 45, hanging the cutting edge 45 from a machine frame 10 through the adjusting screws 21, 22, and making the adjusting screw and the cutting edge 45 as freely mountable/ demoutable and the adjusting screws 21, 22 and the machine frame 10 as freely mountable/demoutable so as to make the position and direction of the cutting edge 45 free.