A lock pin 24 which can be fitted toward a pin-fitting hole 19 (lock pin hole) formed in a shaft 14 (restriction member) of a bell crank 4 is disposed in the turn-motion guide 6 (operation guide) of a base member 120. The base member 120 is provided with a case body 23 (cover body) which covers the base end 27 of the lock pin 24 from outside and which slidably supports the base end 27. A soft body 31 (cushion material) is interposed between the base end 27 of the lock pin 24 and a bottom 23b of the case body 23 opposed to the base end 27 in a state where the soft body 31 is fixed to the base end 27 of the lock pin 24. When the lock pin 24 is disposed at a normal position, the base end 27 of the lock pin 24 is supported by the bottom 23b of the case body 23 through the soft body 31. The invention provides a vehicular door handle device capable of preventing hammering sound from being generated by collision between a lock pin and a cover body.