An EGR device for a watercraft is provided with: an engine for a watercraft; an EGR device which has an entry port and a discharge port, and in which some exhaust gas discharged from the engine is guided in through the entry port, discharged as EGR gas from the discharge port, and recirculated to the engine; an EGR gas discharge flow path that is connected to the EGR device and discharges EGR gasfrom the EGR device to areas other than the engine; an entry-side valve that adjusts the amount of some of the exhaust gas entering from the entry port of the EGR device; an exhaust-side valve that adjusts the amount of EGR gas discharged from the discharge port of the EGR device; and an EGR valve that adjusts the flow rate of EGR gas through the EGR gas discharge flow path.