The invention discloses a piezoelectric igniter comprising a first casing (1), a second spring (3), a strike head (4), a first spring (5) arranged between the first casing (1) and the second casing (2), a nail (7) in the second casing (2), a piezoelectric ceramic (8) and a piezoelectric block (9), wherein the second spring and the strike head are positioned in the first casing; the side of the nail (7) is provided with a conducting piece 6 contacting with the nail, and the conducting piece 6 extends out of the second casing (2) through a first opening (22) on the side wall of the second casing; and the side wall of the second casing (2) opposite to the first opening (22) is provided with a second opening (22) for the conducting block (9) to insert. The conducting block (9) of the piezoelectric igniter is inserted from the side of the second casing, and by only using one piezoelectric ceramic, the voltages of two ends of the piezoelectric igniter are led out respectively by the conducting piece and the conducting block, so that the assembly speed and the assembly efficiency of the piezoelectric igniter are improved, the internal structure of the piezoelectric igniter is simplified, and the stability of the piezoelectric igniter is increased.