To inexpensively provide a column erecting concrete block and a locking member, capable of reducing labor in construction, shortening a construction period, and reducing construction cost, when installing a column of a road sign, a curve mirror or a protective fence.

This column erecting concrete block is a concrete block 100 for installing the column of the road sign, the curve mirror and the protective fence, and has a locking object recessed part 12 performing positioning in the height direction of a column, by placing a locking member projecting in the horizontal direction from the column, in one or two or more places of an upper surface of the block 100, by forming a column fixing hole 11 for inserting the column on the upper surface of the block 100.