The present application provides a wall-mounted air purifier, which includes a casing, a fan and a purification module; the casing is provided with an air inlet and an air outlet; the fan is located between the air inlet and the air outlet; and the purification module is arranged at an air flow path of the fan; the purification module comprises a bracket mounted in the casing and a filter inserted in the bracket, a front side surface of the casing is provided with a insertion hole configured for inserting the filter into the bracket, the insertion hole is located at a position corresponding to the filter, the wall-mounted air purifier further comprises a front cover covering at a front side of the casing, and the front cover is detachably connected to the casing.