A web joint apparatus 200 is configured to join a pair of webs 61, 62 for absorbent article 1 folded in the cross direction CD with reference to a folding line. The web joint apparatus 200 includes: an ultrasonic horn 211 configured to join the paired waistline portions 10 an anvil 222 facing the ultrasonic horn 211 and configured to pinch the intermediate web 6 between the anvil 222 and the ultrasonic horn 211 and a crotch hold bar 240 configured to hold the intermediate web 6 while stretching the intermediate web 6 in a direction in which the crotch portions 20 get away from the waistline portions, when the intermediate web 6 are joined by the ultrasonic horn 211 and the anvil 222.
