A cavity filter comprising: a resonance element including a coupling block; a first case and a second case housing the resonance element; a terminal unit penetrating the first case to be connected to an electrode pad of a PCB provided on the outside of the first case and the other end thereof is electrically connected to the coupling block of the resonance element; and an assembly unit provided on either one side or both sides of the case, and having a terminal insertion hole in which the terminal unit is insertedly provided, wherein the assembly unit is formed to protrude to the outside from a lower surface of the first case. the assembly unit provide a height between the first casing and PCB so the cavity filter avoid interference with the devices mounted on the PCB.