An evaporator for a refrigerator, in particular a domestic refrigerator, includes at least one refrigerant channel and at least one plate. The plate has a receptacle, arranged in a space defined by the refrigerant channel, for positioning a tube. The receptacle is formed by at least one projection, which forms a longitudinal guide of the tube. The projection is formed on the at least one plate and defines a channel having a channel wall upon which the tube bears at least partially in a longitudinal direction. The tube is, for example, a protective tube for a temperature sensor.