The present invention relates to an oil removing ship comprising: an inflow part (10) formed to induce the seawater into the ship; a conversion part (20) for converting a state of the seawater, induced by the inflow part (10), into a laminar flow state; a separation part (30) for separating the seawater, which is converted into the laminar flow state by the conversion part (20), into water and oil; an oil storage part (40) for storing the oil separated from the seawater by the separation part (30); and an outflow part (50) formed to discharge the water separated from the seawater by the separation part (30). The oil removing ship, according to the present invention: minimizes an installation space by simplifying a facility; is economical because facility costs are reduced as well as an installation workload; is energy efficient since the energy is saved by making it possible to remove the oil from the seawater in a short time; saves material costs and simplifies maintenance by recycling oil skimmers; and is environmentally friendly because the holes formed on the oil skimmers allow the oil to be separated from the seawater precisely.