The invention relates to a respirator for nebulizer therapy for an infant. The respirator includes a cover body, elastic fixing bands and a medicine mist catheter. The elastic fixing bands are symmetrically arranged at the middle parts on the two sides of the cover body. The medicine mist catheter is fixed at a middle position in the upper part of the cover body and a part of the medicine mist catheter in the cover body is provided with a branch pipe. The tail end of the branch pipe is provided with a bending head so as to enable the mist outgoing direction to be horizontal. The outer surface of the cover body is a convex curved face and the outline is in the shape of a rectangle with chamfers and having a bow-shaped cross section. The lower part and the lower end face of the cover body are each provided with air outlets. According to the invention, exhalant gas can be discharged timely, medicine mist purity in the respirator can be improved and the outlet of the medicine mist is adjacent to nostrils of the infant, so that maximal utilization of the medicine mist is achieved and the therapy effect and medicine utilization rate can be improved. At the same time, a nipple is arranged, so that fear of the infant can be relieved and mood stability of the infant in the treatment process is promoted.