To provide a highly strong pavement concrete board having a drainage function and a manufacturing method for it.

In this concrete board, a drain slit is provided on the concrete upper surface, and a drain pore having a larger cross section area than the silt is provided below the slit. This concrete board can be manufactured by placing concrete while arranging a core, which is constructed of an expansible cylinder body filled with a fluid, horizontally in a form for the concrete board, discharging the fluid in the core after removal of the form, and pulling out the expansible cylinder body from the concrete.