A cabinet defining defines an external appearance of the laundry treatment apparatus. A top is cover located at the top of the cabinet. The top cover is provided at both sides thereof with holder insertion portions respectively and a holder configured to be inserted into each of the holder insertion portions to couple the top cover to the cabinet. The holder includes a base part coupled to an upper end of the cabinet and a holding part located on the base part to prevent the holder insertion portion from being separated from the base part inserted therein. The holding part is inserted into the holder insertion portion and then the top cover is moved rearward to cause the base part to be inserted into the holder insertion portion.