Abstract: The heating and cooling mattress is a mattress for a bed that includes a heating member and a cooling member, which work to either heat or cool the mattress when in use. The heating member is constructed of a heating element that traverses along a first plane, and which evenly distributes heat along an entire surface area of the mattress. The cooling member is constructed of a refrigeration cycle from which a condensing line traverses along a second plane in order to cool down the mattress. The heating member and the cooling member are independent of one another, but work alternately such that either the cooling member or the heating member is only able to operate at a given time. The first plane for the heating member is located at a lower elevation with respect to the second plane for the cooling member.