Abstract: The invention relates to a reference junction for thermocouple measuring, comprising two reference temperature blocks (5) connected with one another heat conductively but dielectrically, one block for each thermocouple conductor and each block provided with a contact surface (4) for receiving the thermocouple conductor, and means (1) for retaining the thermocouple conductors or their attached contacts in contact with the contact surfaces (4) of the respective reference temperature blocks (5). To enable rapid fixing and detachment of the thermocouple conductors or their attached contacts, the means for retaining the thermocouple conductors in contact with their contact surfaces (4) comprise a single unitary retention block (1) pressed by spring-biased action against the contact surfaces.