The present disclosure relates to a drier cartridge that can improve the effect of cleaning compressed air by filtering out water, oil, and foreign substances, which are contained in compressed air, through several steps therein. In particular, when a narrow compressed air channel is formed between a cartridge body and a cartridge housing, a collision member that is a pre-filtering member that can primarily filter out oil, etc. is formed between the cartridge body and the housing, whereby it is possible to improve the performance of removing oil and water from a filter cartridge.