Provided is a vehicular door outer handle device including a handle body having a housing recess, a handle cover covering the handle body from the outside, a base member fixed to a vehicle door, and a support arm connected to one end in a longitudinal direction of the handle body and rotatably supported by the base member via a support shaft. A slit through which a harness connected to an electronic component housed in the housing recess is inserted is formed in the one end of the handle body and in the support arm. Although there is provided the slit that facilitates assembly work of the harness, reduction in strength is prevented while avoiding an increase in the number of parts. A handle cover