A machine for splitting wood logs or blocks, comprising: - an endless conveyor belt provided with an upper strand extending from an upstream end to a downstream end, said conveyor belt is provided with means ensuring the progression of its upper strand in a direction of progression, from said upstream end to said downstream end, - a splitting chamber, provided above a part of said upper strand of said conveyor belt, and - a splitting wedge, positioned above said upper stand of said endless conveyor and actuated by a hydraulic splitting cylinder, of the dual-acting type, including a body associated with a piston provided with a rod, said splitting wedge being mounted at the end of said piston rod of said splitting cylinder, the latter being actuated by means adapted to ensure its displacement in translation along an axis perpendicular or substantially perpendicular to said direction of progression of said conveyor belt, according to successive movements of: a) extraction of said piston rod from its body to ensure the penetration of said splitting wedge into said splitting chamber, in order to perform the operation of splitting the wood logs or blocks, and b) entry of said piston rod into its body, to remove said splitting wedge from said splitting chamber, characterized in that said means ensuring the progression of the upper strand of said conveyor belt consist in means for step-by-step progression that are controlled by a hydraulic cylinder, called belt hydraulic cylinder, which belt hydraulic cylinder is actuated by said entry movement of said piston rod of said hydraulic splitting cylinder. - an endless conveyor belt provided with an upper strand extending from an upstream end to a downstream end, said conveyor belt is provided with means ensuring the progression of its upper strand in a direction of progression, from said upstream end to said downstream end, - a splitting chamber, provided above a part of said upper strand of said conveyor belt, and - a splitting wedge, positioned above said upper stand of said endless conveyor and actuated by a hydraulic splitting cylinder, of the dual-acting type, including a body associated with a piston provided with a rod, said splitting wedge being mounted at the end of said piston rod of said splitting cylinder, the latter being actuated by means adapted to ensure its displacement in translation along an axis perpendicular or substantially perpendicular to said direction of progression of said conveyor belt, according to successive movements of: a) extraction of said piston rod from its body to ensure the penetration of said splitting wedge into said splitting chamber, in order to perform the operation of splitting the wood logs or blocks, and b) entry of said piston rod into its body, to remove said splitting wedge from said splitting chamber, characterized in that said means ensuring the progression of the upper strand of said conveyor belt consist in means for step-by-step progression that are controlled by a hydraulic cylinder, called belt hydraulic cylinder, which belt hydraulic cylinder is actuated by said entry movement of said piston rod of said hydraulic splitting cylinder. a) extraction of said piston rod from its body to ensure the penetration of said splitting wedge into said splitting chamber, in order to perform the operation of splitting the wood logs or blocks, and b) entry of said piston rod into its body, to remove said splitting wedge from said splitting chamber, characterized in that said means ensuring the progression of the upper strand of said conveyor belt consist in means for step-by-step progression that are controlled by a hydraulic cylinder, called belt hydraulic cylinder, which belt hydraulic cylinder is actuated by said entry movement of said piston rod of said hydraulic splitting cylinder.