The present invention provides an apparatus for controlling body temperature of a patient during hypothermia treatment, comprising: a body trunk cooling unit having a first affixing portion to be applied on a surface of the trunk of a patient's body and for cooling the surface of the trunk of the patient's body; and a body peripheral part heating unit having a second affixing portion to be applied to the peripheral part of the patient's body and for heating the peripheral part of the body by utilizing exhaust heat from the body trunk cooling unit and suppressing activation of cold receptors of the skin of the patient.