Abstract: A block for retaining wall of a leaning type includes a front wall disposed with an upper portion thereof located behind a lower portion thereof so as to lean gradually in a backward direction, a partition wall having a length as substantially long as a vertical length of a rear wall portion of the front wall and extending backward, and a bottom plate connected integrally to a bottom portion of the front wall and extending backward. At least either of the front wall or said partition wall is provided with an opening which extends vertically over an entire length of said partition wall and into which an iron bar or rod is disposed.