A vehicle door handle device, comprising: a frame configured to be fixed on a vehicle inner side of a door panel of a vehicle door, the frame having a supporting hole formed therein; a link comprising a shaft section pivotably supported in the supporting hole of the frame, the link being pivotably assembled to the frame through intermediation of the shaft section, and configured to be rotated and biased by a biasing member to one side; and an outer handle configured to be mounted on the door panel, the outer handle comprising an engaging recessed portion to be engaged on the link, the outer handle being configured to pivot the link through intermediation of the engaging recessed portion against a rotational biasing force of the biasing member, wherein the shaft section comprises: a guide portion (141a, 141b) formed in an outer peripheral surface of the shaft section, the frame comprises: an opening formed continuously with the supporting hole so as to enable the guide portion (141a, 141b) to be inserted through the opening from the direction different from the rotation axis direction, characterized in that the shaft section comprises a groove portion recessed in one end portion of the shaft section in a rotation axis direction of the shaft section so as to extend to another end portion side of the shaft section; wherein the guide portion (141a, 141b) extends in an extending direction of the groove portion; the frame comprises: a groove engaging portion insertable through the groove portion from a direction different from the rotation axis direction; and wherein under a state in which the shaft section is supported in the supporting hole, the groove portion and the opening extend in different directions. a frame configured to be fixed on a vehicle inner side of a door panel of a vehicle door, the frame having a supporting hole formed therein; a link comprising a shaft section pivotably supported in the supporting hole of the frame, the link being pivotably assembled to the frame through intermediation of the shaft section, and configured to be rotated and biased by a biasing member to one side; and an outer handle configured to be mounted on the door panel, the outer handle comprising an engaging recessed portion to be engaged on the link, the outer handle being configured to pivot the link through intermediation of the engaging recessed portion against a rotational biasing force of the biasing member, wherein the shaft section comprises: a guide portion (141a, 141b) formed in an outer peripheral surface of the shaft section, the frame comprises: an opening formed continuously with the supporting hole so as to enable the guide portion (141a, 141b) to be inserted through the opening from the direction different from the rotation axis direction, the shaft section comprises a groove portion recessed in one end portion of the shaft section in a rotation axis direction of the shaft section so as to extend to another end portion side of the shaft section; wherein the guide portion (141a, 141b) extends in an extending direction of the groove portion; the frame comprises: a groove engaging portion insertable through the groove portion from a direction different from the rotation axis direction; and wherein under a state in which the shaft section is supported in the supporting hole, the groove portion and the opening extend in different directions. a groove engaging portion insertable through the groove portion from a direction different from the rotation axis direction; and wherein under a state in which the shaft section is supported in the supporting hole, the groove portion and the opening extend in different directions.