A Universal Serial Bus, USB, adapter for a vehicle, the USB adapter comprising: a casing configured to be installed at a center fascia or a console box of the vehicle, wherein one surface thereof is open; and a printed circuit board received inside the casing, wherein a USB port is mounted at one end of the printed circuit board and a receptacle is mounted at the other end thereof; wherein the USB adapter is characterized in that: it further comprises a heat dissipation member configured to transfer heat generated during power supply and data transmission to the casing, such that the casing dissipates the heat out of the USB adapter, the ceiling and bottom of the casing have heat dissipation pins protruding toward the printed circuit board, the heat dissipation pins are formed at positions corresponding to components mounted on the printed circuit board, but protrude at different heights depending on the height of the components so that the gap with the components is always constant, and the heat dissipation member is interposed between the components and the heat dissipation pins, and where the heat dissipation member 300 has a predetermined thickness and is attached to vertical ends of the components 230 and comes into contact with the heat dissipation pins 150 when assembling the casing 100. a casing configured to be installed at a center fascia or a console box of the vehicle, wherein one surface thereof is open; and a printed circuit board received inside the casing, wherein a USB port is mounted at one end of the printed circuit board and a receptacle is mounted at the other end thereof; wherein the USB adapter is characterized in that: it further comprises a heat dissipation member configured to transfer heat generated during power supply and data transmission to the casing, such that the casing dissipates the heat out of the USB adapter, the ceiling and bottom of the casing have heat dissipation pins protruding toward the printed circuit board, the heat dissipation pins are formed at positions corresponding to components mounted on the printed circuit board, but protrude at different heights depending on the height of the components so that the gap with the components is always constant, and the heat dissipation member is interposed between the components and the heat dissipation pins, and where the heat dissipation member 300 has a predetermined thickness and is attached to vertical ends of the components 230 and comes into contact with the heat dissipation pins 150 when assembling the casing 100. it further comprises a heat dissipation member configured to transfer heat generated during power supply and data transmission to the casing, such that the casing dissipates the heat out of the USB adapter, the ceiling and bottom of the casing have heat dissipation pins protruding toward the printed circuit board, the heat dissipation pins are formed at positions corresponding to components mounted on the printed circuit board, but protrude at different heights depending on the height of the components so that the gap with the components is always constant, and the heat dissipation member is interposed between the components and the heat dissipation pins, and where the heat dissipation member 300 has a predetermined thickness and is attached to vertical ends of the components 230 and comes into contact with the heat dissipation pins 150 when assembling the casing 100.