To provide a liner plate and a deep foundation construction method, safely performing works, improving working efficiency, reducing cost, and providing a high strength shaft.

An abutting part 53 is abutted on a recess part 11c which constitutes a waveform of a liner plate unit 11 by sliding the abutting part 53 toward the liner plate unit 11. After abutting four abutting parts 53 on the recess part 11c of the liner plate unit 11, the liner plate unit 11 is supported with a supporting frame 5 by tightening each volt 54 to a base 51. A flange part 11a of the liner plate unit 11 and a flange part 12a of a liner plate unit 12 are connected by thread engaging a volt 3 with a nut 4 in an outside of a shaft on the ground or the like.