A helix antenna device includes a board, a signal output circuit, a ground wire, and a helix antenna. The board includes first holes and second holes. The first holes are aligned to form a first row, and the second holes are aligned to form a second row. The signal output circuit is disposed on the board. The ground wire disposed on the board is between the first row and the second row and is connected to the signal output circuit. The helix antenna is rotationally passed through the first holes and the second holes so that it can surround a part of the area of the board. One end of the helix antenna is electrically connected to the signal output circuit. Thereby, it is convenient to have the helix antenna assembled to the board, and the structure parameters of the helix antenna are not easily influenced due to deformation.