Housing, barrel and camera module with the same

The camera module is disclosed having a housing, a barrel, and this. The housing, in the housing in which a barrel is inserted, the formed first hollow portion having a first width, the lower trap to collect the dust formed in the gap between the bottom of recess at a lower end thereof formed in the gap between the barrel and a dust and a member having an upper trap formed concavely in the lower side to the upper end portion in a gap formed between itself and the barrel to collection; And a second hollow portion of the first hollow part and the formed stepped member having a second width that is larger than the first width.