A line-winding device is a line-winding device for fishing capable of being fixed to a fishing rod, the line-winding device including: a spool capable of winding a fishing line around a central axis substantially parallel to an extending direction of the fishing rod; a rotor including a guide part for guiding the fishing line and rotatable around the spool; an operating part for rotationally operating the guide part; and a switching part for switching availability of guiding by the guide part, and including: a support shaft portion that pivotally supports the spool rotatably and is rotatably supported with respect to a device main body; a restoration unit for applying a restoring force between the support shaft portion and the spool; and a detection unit for detecting an angular position of the support shaft portion.