Piston compressor comprising: - a piston guided in a compressor cylinder wherein the piston and the compressor cylinder form a compressor chamber for compressing a fluid; - a shaft provided rotary around its axis; and - a lifting element (6, 13) arranged eccentrically to the axis of the shaft and provided fixed to the shaft, wherein the lifting element (6, 13) and the piston are configured in such way that the piston performs a movement between a maximum and a minimum lifting position when the shaft performs a full rotation around its axis, wherein the compressor further comprises at least one further piston guided in a further compressor cylinder, wherein the at least one further piston is connected directly or via intermediate elements to a further lifting element (6, 13) arranged on the shaft in such way that the at least one further piston is configured to perform a movement between a maximum and a minimum lifting position when the shaft performs a full rotation around its axis, characterized in that a space is provided between the lifting element (6, 13) and the further lifting element (6, 13) for cooling, wherein the lifting element (6, 13) comprises a circular disc, which is eccentrically provided to the shaft regarding its axis. - a piston guided in a compressor cylinder wherein the piston and the compressor cylinder form a compressor chamber for compressing a fluid; - a shaft provided rotary around its axis; and - a lifting element (6, 13) arranged eccentrically to the axis of the shaft and provided fixed to the shaft, wherein the lifting element (6, 13) and the piston are configured in such way that the piston performs a movement between a maximum and a minimum lifting position when the shaft performs a full rotation around its axis, wherein the compressor further comprises at least one further piston guided in a further compressor cylinder, wherein the at least one further piston is connected directly or via intermediate elements to a further lifting element (6, 13) arranged on the shaft in such way that the at least one further piston is configured to perform a movement between a maximum and a minimum lifting position when the shaft performs a full rotation around its axis, characterized in that a space is provided between the lifting element (6, 13) and the further lifting element (6, 13) for cooling, wherein the lifting element (6, 13) comprises a circular disc, which is eccentrically provided to the shaft regarding its axis. the lifting element (6, 13) and the piston are configured in such way that the piston performs a movement between a maximum and a minimum lifting position when the shaft performs a full rotation around its axis, wherein the compressor further comprises at least one further piston guided in a further compressor cylinder, wherein the at least one further piston is connected directly or via intermediate elements to a further lifting element (6, 13) arranged on the shaft in such way that the at least one further piston is configured to perform a movement between a maximum and a minimum lifting position when the shaft performs a full rotation around its axis, characterized in that a space is provided between the lifting element (6, 13) and the further lifting element (6, 13) for cooling, wherein the lifting element (6, 13) comprises a circular disc, which is eccentrically provided to the shaft regarding its axis.