A deodorization module includes an upper housing having an open top and an open bottom; a lower housing coupled to the upper housing; a photocatalytic filter located inside a flow channel and accommodated in the upper housing via the open top of the upper housing; a light source unit located outside the flow channel and comprising at least one light source for emitting ultraviolet rays towards the photocatalytic filter, and a substrate on which the at least one light source is mounted; and a transparent member located between the photocatalytic filter and the light source unit and accommodated in the upper housing via the open bottom of the upper housing.