The present invention relates to air purification techniques and provides an air purifier. The air purifier comprises a shell (1) with an air inlet (11) and an air outlet (12). An electric field filter (2), an air passage (3) and a blower (4) are disposed inside the shell (1). The electric field filter (2) comprises a filter frame (21) disposed at the air outlet and a grid base (22) disposed under the filter frame. A filter (211) is provided inside the filter frame (21). One end of the air passage (3) connects with the grid base (22) and the other end connects with the blower (4). The blower (4) is disposed at the air inlet (11). The filter frame (21) and the grid base (22) are integrated as a hermetic whole. Due to the integrated configuration of the filter frame and the grid base, when removing out the electric field filter, the power is cut automatically. This effectively prevents an occurrence of the electric shock, and improves safety performance of the purifier. Furthermore, air leakage can be greatly reduced, for there is no gap between the filter frame and the grid base.
