PURPOSE: To obtain a new azido group-containing addition polymerizable type monomer useful as an addition polymerizable type monomer for producing photosensitive resins having an ultraviolet ray photosensitive region.

CONSTITUTION: The objective azido group-containing addition polymerization type monomer is expressed by formula I. This compound expressed by formula I is obtained by dissolving 4-azido-4'-glycidoxychalcone and methyl methacrylate in, e.g. an alcoholic solvent, dropping 1,1-dimethylhydrazine thereinto at ambient temperature or below and then carrying out the thermal reaction. The compound expressed by formula I is capable of introducing azido group into a polymer by homopolymerization or copolymerization with a usual addition polymerizable type monomer. Since the resultant polymer has the azido group having an ultraviolet absorption region at ≥300nm, a highly sensitive photosensitive resin is provided. This resin can be used as, e.g. photoresists for LSI, photoresists for printed circuit boards, photoresists for producing printing plates, fluorescent screens of cathode-ray tubes and color filters for liquid crystal displays, etc.