A presser foot for a sewing machine, for pressing down a fabric to be sewn onto a stitch plate or onto a feed dog element of the sewing machine such that the fabric during sewing is transportable in a transport direction, the presser foot comprising: a shank configured to fasten the presser foot to a sewing machine, a needle opening through which the sewing machine needle is able to be guided during sewing, a presser foot sole having an elongate depression in the presser foot sole, the elongate depression in the presser foot sole extends along a longitudinal direction thereof laterally adjacent to the needle opening such that the longitudinal direction during sewing extends parallel to the transport direction, the elongate depression forms a guide wall which during sewing is configured to guide a filler material to be sewn into the fabric to be sewn in the transport direction laterally beside the needle opening and past the needle opening, and to press said filler material against the fabric to be sewn, and the elongate depression has an extent L in the longitudinal direction, an extent B in the width, and an extent T in the depth, characterized in that the guide wall comprises a guide wall portion that is positionally fixed relative to the needle opening and a guide wall portion that is displaceable relative to the needle opening and the displaceable guide wall portion is displaceable along a displacement direction and lockable transversely to the longitudinal direction of the elongate depression such that one of the extents B, T transverse to the extent L of the elongate depression is variably adjustable by displacement and locking the displaceable guide wall portion, characterized in that the positionally fixed guide wall portion has a plane, the displacement direction runs parallel to this plane, and the displaceable guide wall portion is displaceable along this plane. a shank configured to fasten the presser foot to a sewing machine, a needle opening through which the sewing machine needle is able to be guided during sewing, a presser foot sole having an elongate depression in the presser foot sole, the elongate depression in the presser foot sole extends along a longitudinal direction thereof laterally adjacent to the needle opening such that the longitudinal direction during sewing extends parallel to the transport direction, the elongate depression forms a guide wall which during sewing is configured to guide a filler material to be sewn into the fabric to be sewn in the transport direction laterally beside the needle opening and past the needle opening, and to press said filler material against the fabric to be sewn, and the elongate depression has an extent L in the longitudinal direction, an extent B in the width, and an extent T in the depth, characterized in that the guide wall comprises a guide wall portion that is positionally fixed relative to the needle opening and a guide wall portion that is displaceable relative to the needle opening and the displaceable guide wall portion is displaceable along a displacement direction and lockable transversely to the longitudinal direction of the elongate depression such that one of the extents B, T transverse to the extent L of the elongate depression is variably adjustable by displacement and locking the displaceable guide wall portion, characterized in that the positionally fixed guide wall portion has a plane, the displacement direction runs parallel to this plane, and the displaceable guide wall portion is displaceable along this plane.