A liquid medicine supply device (1) including a container (10) which has a containing portion (11) and a mouth (16)； an interior cap (30)； and an exterior cap (60). The interior and exterior caps (30, 60) include a ratchet mechanism (50, 80). The interior cap (30) includes: an interior-cap main body (32) with a contact ring (44) to tightly close the container (10)； and an engaging portion (50). The exterior cap (60) includes: an exterior-cap main body (62)； and an engaged portion (80). The engaged portion (80) and the engaging portion (50) constitute the ratchet mechanism. The contact ring (44) is distant from the engaging portion (50) in a radial direction of the interior-cap main body (32).
