A lens assembly that can be quickly released and assembled is provided. The lens assembly has a lens structure, a fixing structure and a quick release structure. The fixing structure can fix the lens structure around the eyes of a user. The quick release structure has a first quick release portion and a second quick release portion. The first quick release portion is disposed on the lens structure, and the second quick release portion is disposed on the fixing structure. The lens structure and the fixing structure can be assembled and disassembled rapidly by means of the first quick release portion and the second quick release portion without additional tools.
