To securely let a vessel come off and drop even if the vessel remains in a holder.

This vessel discharging device is provided with a conveyance chain 1 having many holders 2, storing the vessel 3 in each holder 2, and conveying it, a bottom face guide 5 supporting a bottom face of the vessel 3 conveyed by the conveyance chain 1, and a chute 6 provided on the downstream side of the bottom face guide 5, receiving the vessel 3 coming out of the holder 2, and dropping and guiding it downward. An engaging member 12 engaging with a side face of the vessel 3 stored in the holder 2 is provided in the bottom face guide 5.