A laundry treatment apparatus may include a cabinet defining an appearance of the laundry treatment apparatus, a drum provided in the cabinet and configured to hold laundry, a connecting duct configured to communicate with the drum, a lint filter unit that is mounted to an inner surface of the cabinet that is accessible from a front surface of the cabinet, and that is configured to communicate with the connecting duct to filter pollutant and a lock unit configured to selectively lock the lint filter unit to the connecting duct, where the lock unit includes a rotatable lock body, a shaft configured to rotate together with the lock body, at least one bent portion, and a lock guide with at least one bent section.