The present invention discloses a medical atomizer, which comprises a drug storage device, an atomized drug collecting tank and an atomization generating assembly, an accommodation chamber is formed between the lower part of the drug storage device and the atomized drug collecting tank, the accommodation chamber is used for accommodating the atomization generating assembly; the atomization generating assembly comprises a sealing sleeve and an atomizing sheet. The medical atomizer of the present invention can be produced and assembled easily, and has a high drug utilization rate.