[Problem] To provide a drug supply device which can reliably prevent accidental opening by an infant or child. [Solution] This drug supply device (1) is provided with a container (10) having a housing part (11) and an opening (16), an interior cap (30), and an exterior cap (60). The interior cap (30) and the exterior cap (60) have a ratchet mechanism (50, 80). When the exterior cap has been rotated with respect to the opening in a state in which the exterior cap has been pressed in towards the interior cap, the ratchet mechanism rotates the exterior cap (60) and the internal cap (30) as a single body； when the exterior cap is rotated with respect to the opening in a state in which the exterior cap has not been pressed in towards the interior cap, the ratchet mechanism causes the exterior cap (60) to rotate relative to the interior cap (30). The axial direction of the opening (16) is inclined at a prescribed angle (θ) with respect to the axial direction of the housing part (11).
