A heat radiating apparatus that is placed in close contact with a heat source to radiate heat of the heat source in air, the heat radiating apparatus comprising: a support member which has a shape of a plate, and is placed in close contact with the heat source on a first principal surface side; a heat pipe which is supported by the support member, and is thermally joined with the support member to transfer the heat from the heat source; and a plurality of heat radiating fins which is placed in a space that faces a second principal surface opposite to the first principal surface and is thermally joined with the heat pipe to radiate the heat transferred by the heat pipe, wherein the heat pipe comprises: a first line part which is thermally joined with the support member; a second line part which is thermally joined with the plurality of heat radiating fins; and a connecting part which connects one end part of the first line part to one end part of the second line part such that the first line part and the second line part are successive, and protrudes from the support member in a direction in which the first line part extends, characterized in that: a plurality of heat radiating apparatuses can be connected such that the first principal surfaces are successive, and when the plurality of heat radiating apparatuses are connected in the direction in which the first line part extends, each of the plurality of heat radiating apparatuses has a receiving part for receiving the connecting parts of adjacent heat radiating apparatuses in the space that faces the second principal surface. a support member which has a shape of a plate, and is placed in close contact with the heat source on a first principal surface side; a heat pipe which is supported by the support member, and is thermally joined with the support member to transfer the heat from the heat source; and a plurality of heat radiating fins which is placed in a space that faces a second principal surface opposite to the first principal surface and is thermally joined with the heat pipe to radiate the heat transferred by the heat pipe, wherein the heat pipe comprises: a first line part which is thermally joined with the support member; a second line part which is thermally joined with the plurality of heat radiating fins; and a connecting part which connects one end part of the first line part to one end part of the second line part such that the first line part and the second line part are successive, and protrudes from the support member in a direction in which the first line part extends, characterized in that: a plurality of heat radiating apparatuses can be connected such that the first principal surfaces are successive, and when the plurality of heat radiating apparatuses are connected in the direction in which the first line part extends, each of the plurality of heat radiating apparatuses has a receiving part for receiving the connecting parts of adjacent heat radiating apparatuses in the space that faces the second principal surface. a first line part which is thermally joined with the support member; a second line part which is thermally joined with the plurality of heat radiating fins; and a connecting part which connects one end part of the first line part to one end part of the second line part such that the first line part and the second line part are successive, and protrudes from the support member in a direction in which the first line part extends, characterized in that: a plurality of heat radiating apparatuses can be connected such that the first principal surfaces are successive, and when the plurality of heat radiating apparatuses are connected in the direction in which the first line part extends, each of the plurality of heat radiating apparatuses has a receiving part for receiving the connecting parts of adjacent heat radiating apparatuses in the space that faces the second principal surface. a plurality of heat radiating apparatuses can be connected such that the first principal surfaces are successive, and when the plurality of heat radiating apparatuses are connected in the direction in which the first line part extends, each of the plurality of heat radiating apparatuses has a receiving part for receiving the connecting parts of adjacent heat radiating apparatuses in the space that faces the second principal surface.