A washing machine includes a detergent supply apparatus having a detachable partition member. The detergent supply apparatus includes a casing which defines an outer appearance of the detergent supply apparatus, and a detergent/fabric softener container slidably set in the casing. The detergent/fabric softener container includes a fixed partition member which partitions the detergent/fabric softener container into a detergent chamber and a fabric softener chamber, and the detachable partition member is removably mounted in the detergent chamber, so as to partition the detergent chamber into a secondary detergent storing section and a main detergent storing section. The detergent chamber is entirely used as the main detergent storing section in response to removal of the detachable partition member from the detergent chamber.