To provide a method of constructing a pattern wall surface corner section capable of attractively finishing the pattern wall surface corner section without requiring the need of adjusting the dimensions of pattern mold forms at the corner section of a pattern wall surface and of increasing construction efficiency.

This method of constructing the pattern wall surface corner section comprises (1) a step of disposing the pattern mold forms 20 supported on a holding frame 21 at positions around which the pattern wall surface is formed, (2) a step of so disposing adjusting hardware 10 matching the shape of the corner section between the both pattern mold forms 20 that its both wing parts 11 are installed on the end surfaces of the pattern mold form 20 to close the space 31 formed between the pattern mold forms among the mold forms 20 which are positioned on both sides of the corner section, and (3) a step of depositing concrete in each pattern mold form 20.