The invention relates to a device for measuring the temperature in the anus or in the vagina of an animal, wherein a front longitudinal part, an abutment part and a rear longitudinal part lie in succession on the device, wherein the front longitudinal part is equipped with a temperature sensor and, when used as intended, it is intended to be inserted into the anus or the vagina of the animal until the abutment part approximately rests against the outside of the body of the animal. One or more further temperature sensors are attached to the rear longitudinal part and/or to the abutment part, which, when used as intended, are provided for measuring the temperature in the surroundings of the animal.
