To provide a tire bead assembling part enhancing a uniformity and a pneumatic tire using it.

In the tire bead assembling part and the pneumatic tire using it, a bead filler 3 is arranged on an outer periphery of a bead core 2 on which a band-like body 4 with an arranged steel cords is wound in a ring-like. A wire splice part 5 between a winding starting part 4a and a winding ending part 4b of the band-like body and a bead filler splice part 6 of the bead filler are positioned at the same position on a periphery.