The invention relates to a method for producing spacers from a bone cement comprising the following chronological steps: A) controlling the temperature of a casting mould to a first temperature B) filling a cement dough, which has a temperature that is lower than the temperature of the temperature-controlled casting mould, into the temperature-controlled casting mould C) allowing the cement dough to cure in the casting mould to form a spacer and D) separating the casting mould from the spacer after the spacer is cured. The invention also relates to a device for producing spacers from a bone cement through said method comprising a casting mould and a temperature control facility for controlling the temperature of the casting mould, whereby at least 80% of the inner surface of the casting mould comprises a negative image of the spacer surface to be produced.