A laser balancer having a wedge-shaped auxiliary wheel is disclosed. The laser flattener with the disclosed subsidiary wheel has a center scraper, a left side scraper for extending the left side of the center scraper while sliding on the left side of the center scraper, and a right side length of the center scraper while sliding on the right side of the center scraper. A flat scraper consisting of a right side scraper for cleaning； An arm having one end coupled to the center of the upper end of the flattening scraper and having a quick change coupled to the rear of the tractor at three points； A connecting frame rotatably connected in the vertical direction to the center of the rear end of the flat scraper； A wheel frame connected to the rear end of the connection frame in a lateral direction and provided with wheels for movement at both ends； A pair of guide members coupled vertically to both sides of the portion where the connection frame of the evening scraper is connected； It is installed to be elevated along each guide member, the auxiliary wheel shaft provided with an auxiliary wheel at the bottom； A shaft retraction member for supporting the auxiliary wheel shaft in the vertical direction by hydraulic pressure while being supported by the guide member； And an operation unit for operating the shaft retracting member while being installed in the work machine, wherein the guide member has a rectangular cylinder shape, and is fixed to the rear of the flat scraper via a bracket, and the auxiliary wheel shaft is inserted into the guide member. It is installed so as to slide in the longitudinal direction, the shaft retracting member further comprises a hydraulic cylinder consisting of a cylinder body that is pin-coupled to the upper end of the guide member, and a cylinder rod connected to the auxiliary wheel shaft, the tip is a pair of guide members The spacing further comprises a shorter one than the spacing between the wheels for movement.출몰형 보조바퀴를 갖는 레이저 균평기가 개시되
