Abstract: A straight edge ripping guide for use in removing one curved and uneven edge of a board having two uneven edges. The double uneven edge board is assembled to the ripping guide that has longitudinally adjustable projections to contact the high points of the uneven edge opposite to the uneven edge that is to be first cut. With the leading end of the board engaging a laterally-extending push stop of the guide, the board and guide are pushed together along the table saw fence to straighten and square the uneven side edge. Pin points are provided on the push stop and one of the projections to hold the board against lateral and upward displacement from the guide. The high point projections are adjustably retained in a continuous dovetail groove. There are main and extension guide pieces that are detachably connected together by elongated square-section blocks fitted into the end of the square hollow openings running through the guide pieces.