An electronic device , comprising: a housing including a front plate corresponding to a front surface of the electronic device, a side plate corresponding to a side surface of the electronic device, and a rear plate corresponding to a rear surface of the electronic device; a heat dissipation device located between the front plate and the rear plate ; an antenna disposed on at least a portion in the housing and adjacent to the heat dissipation device; wherein the heat dissipation device comprises: a container comprising a first plate , a second plate spaced apart from the first plate to define an interior space, and side surfaces extending from edges of the first plate and the second plate to close the interior space; at least one filler part disposed between the first plate and the second plate and configured to support the first plate and the second plate ; a wick layer located on an inner wall defined in the interior space by the first plate or the second plate ; a wick including the at least one filler part and the wick layer ; and a working fluid configured to flow in the interior space in a gaseous state, and flow in the wick layer in a liquefied state, wherein the container further comprises a fluoride-based polymer having a predetermined gas permeability, wherein the wick is formed of a fine spherical powder. a housing including a front plate corresponding to a front surface of the electronic device, a side plate corresponding to a side surface of the electronic device, and a rear plate corresponding to a rear surface of the electronic device; a heat dissipation device located between the front plate and the rear plate ; an antenna disposed on at least a portion in the housing and adjacent to the heat dissipation device; wherein the heat dissipation device comprises: a container comprising a first plate , a second plate spaced apart from the first plate to define an interior space, and side surfaces extending from edges of the first plate and the second plate to close the interior space; at least one filler part disposed between the first plate and the second plate and configured to support the first plate and the second plate ; a wick layer located on an inner wall defined in the interior space by the first plate or the second plate ; a wick including the at least one filler part and the wick layer ; and a working fluid configured to flow in the interior space in a gaseous state, and flow in the wick layer in a liquefied state, a container comprising a first plate , a second plate spaced apart from the first plate to define an interior space, and side surfaces extending from edges of the first plate and the second plate to close the interior space; at least one filler part disposed between the first plate and the second plate and configured to support the first plate and the second plate ; a wick layer located on an inner wall defined in the interior space by the first plate or the second plate ; a wick including the at least one filler part and the wick layer ; and a working fluid configured to flow in the interior space in a gaseous state, and flow in the wick layer in a liquefied state, wherein the container further comprises a fluoride-based polymer having a predetermined gas permeability, wherein the wick is formed of a fine spherical powder. <EOS>