The present invention relates to a running-water-type evaporator, and an ice-making device and a water purification device comprising the same, and to a running-water-type evaporator, and an ice-making device and a water purification device comprising the same, the evaporator uniformly transferring, to ice, heat supplied through high-temperature fluid during ice separation, so as to enable the ice to be easily separated without using separate ice-separating water, and thus minimizes melting of the ice during ice separation, and circulating ice-making water in a state where the ice-making water flows only toward the outer sides of a pair of outer plate members, and thus a degradation in the cleanliness of the ice-making water can be prevented.