An ice maker for refrigerator. The ice maker includes a case for protecting a cooling space to which cold air is supplied, an ice making assembly for making ice by using the cold air in the cooling space, an ice bucket for containing the ice made by the ice making assembly in the cooling space, a discharge assembly having an insulation space which is provided as a path through which the ice contained in the ice bucket is discharged to the outside of the case, and a deodorizing filter placed on a cold air channel that allows the cold air to go by the ice bucket after the cold air coming from the ice making assembly passes through the insulation space.