The invention relates to a lubricating device, particularly for use in an apparatus which is used to lubricate mobile lubrication points e.g. on a rotating belt or chain belt. A lubricant discharge body of a lubricating head, which when lubricant is conveyed by a feed pump into a dosing chamber which is separated from the lubricant discharge channel, is placed in a front standby position and, counter to the effect of a restoring force, is moved into a locking and lubricant release position wherein the link between the pump and the dosing chamber is blocked by a reversing piston and the dosing chamber is fluidically connected to the lubricant discharge channel and a predefined volume of lubricant can be pumped out of the dosing chamber into the lubricant discharge channel. The lubricant discharge body cooperates with a reversing piston in such a way that the feed pump is fluidic ally connected to the dosing chamber of a dosing piston/cylinder arrangement via an annular area of the reversing piston when the lubricant discharge body is located in a front standby position, and such that the dosing chamber is fluidically connected to the lubricant discharge channel via the angular area when the lubricant discharge body is placed in a retracted position in which the lubricant is released. The reversing piston blocks the fluidic connection between the feed pump and the dosing chamber such that the amount of lubricant provided for discharge can be pumped out of the dosing chamber in the direction of the annular area by a dosing piston which is impinged upon by the feed pump.