A stump crusher comprising interconnected and interacting assemblies, which are: - a hydraulic motor assembly on the side of a working machine implement, comprising a hydraulic motor housing and a mounting plate attached to the end of the machine implement for attaching the stump crusher to the working machine implement; - a hydraulic system necessary for controlling the hydraulic motor arranged in a housing of the hydraulic motor; - a gearbox connected to the hydraulic motor and attached to a gearbox housing, to the lower end of which is attached to a gearbox flange, to which is attached a blade holder of the stump crusher; the blade holder of the stump crusher consists of a circular mounting plate of the blade holder, which is attached with fasteners to the gearbox flange at the lower end of the gearbox housing; attached to the centre of the circular mounting plate is a blade holder tower, at the end of which is the cone of the stump crusher; characterized in that the blade holder tower is supported from two sides by tower reinforcement ribs to ensure rigidity, the top end of which is welded to the circular mounting plate and the lower end to the blade holder of the stump crusher; at the lower end of the blade holder of the stump crusher are arranged horizontal blade holders, which are approximately 2/3 of the way from the blade holder tower supported by a horizontal blade holder reinforcement rib, the top end of which is attached to the perimeter of the mounting plate of the blade holder; a step is formed in the horizontal blade holder of the stump crusher, to which the replaceable blade of the stump crusher is attached. - a hydraulic motor assembly on the side of a working machine implement, comprising a hydraulic motor housing and a mounting plate attached to the end of the machine implement for attaching the stump crusher to the working machine implement; - a hydraulic system necessary for controlling the hydraulic motor arranged in a housing of the hydraulic motor; - a gearbox connected to the hydraulic motor and attached to a gearbox housing, to the lower end of which is attached to a gearbox flange, to which is attached a blade holder of the stump crusher; the blade holder of the stump crusher consists of a circular mounting plate of the blade holder, which is attached with fasteners to the gearbox flange at the lower end of the gearbox housing; attached to the centre of the circular mounting plate is a blade holder tower, at the end of which is the cone of the stump crusher; characterized in that the blade holder tower is supported from two sides by tower reinforcement ribs to ensure rigidity, the top end of which is welded to the circular mounting plate and the lower end to the blade holder of the stump crusher; at the lower end of the blade holder of the stump crusher are arranged horizontal blade holders, which are approximately 2/3 of the way from the blade holder tower supported by a horizontal blade holder reinforcement rib, the top end of which is attached to the perimeter of the mounting plate of the blade holder; a step is formed in the horizontal blade holder of the stump crusher, to which the replaceable blade of the stump crusher is attached.