An evaporator of an ice machine operating on a typical ice-making cycle, comprising a heat-conducting metal plate member, an evaporator body formed by folding the metal plate member into a " "-shape after a refrigerant circuit including a capillary tube, refrigerant tube and evaporating tube etc., is oppositely mounted inside of the plate member, and means for fixing the evaporator body in a vertical position inside of the cabinet of an ice machine. The present invention improves productivity by resolving disadvantages such as the increase of the installation space and complex assembly. Moreover, easier and more accurate ice-separating may be attained according to the present invention.