To provide a retaining wall structure excelling in economical efficiency by dividing a base to reduce weight because a base in a conventional L-shaped retaining wall or inverted T-shaped retaining wall is of integral structure and limited in a portable range by product weight and dimension restrictions.

This L-shaped retaining wall structure is not provided with the base from the root of a vertical wall to the center of the base in the L-shaped retaining wall or inverted T-shaped retaining wall, and is composed of a plurality of beam structure parts comprising connecting vertical beams 5 and connecting cross beams 2; a separable base 7 connected to the plurality of beam structure parts; and a separate vertical plate 6.