PURPOSE: To prevent yarn slippage of woven fabric for fiber reinforced plastic by bonding a yarn to at least one face of a woven fabric along the warp of the fabric without constructing the yarn.

CONSTITUTION: A yarn obtained by winding a filament consisting of low melting polymer such as nylon, polyester or polyethylene to a glass fiber filament is arranged on the back face of a woven fabric along the warp of the fabric in the prescribed pitch and then heat-treated to bond the glass fiber filament to the fabric.