A scent air purifier contains a body, a fan, a filter element, a holder, a circuit control unit, a case removable from the body. The body includes an accommodation chamber, a receiving groove, and a first vent. The accommodation chamber is defined in the body, the receiving groove is located above the accommodation chamber, and the first vent communicates with the accommodation chamber and the receiving groove. The fan is accommodated in the accommodation chamber. The filter element is connected below the accommodation chamber and communicates with air from an external environment outside the body so that the fan delivers the air to flow through the first vent and the receiving groove, after drawing the air from the external environment. The holder is connected with the body, and the circuit control unit is housed in the holder and is electrically connected with a power source and the fan.
