A power distribution apparatus is provided. The apparatus may include a modulated block type power distribution apparatus capable of reducing a space by consequently connecting a main breaker to a sub breaker as a block not to form a gap while installing. The apparatus may include a multifunctional block type power distribution apparatus capable of easily connecting breakers with one another, the breaker having different height, by additionally installing a height controller able to control a height of a branch breaker on the apparatus manufactured in one mold and preventing wrong coupling while connecting a plurality of branch breakers with one another. The apparatus may include a preassembled power distribution apparatus capable of increasing coherence between terminals while coupling a main breaker terminal, a branch breaker terminal, and an additional breaker terminal, forming the preassembled power distribution apparatus, with various terminals of another preassembled power distribution apparatus.