A flaskless molding apparatus for an upper and a lower mold that are stacked, comprising: (a) a cope flask and a drag flask, wherein each flask (2, 3) has openings at its both ends and has an sand-filling port at its side wall, (b) a conveying mechanism for inserting a match plate between the cope flask and the drag flask and for taking it out from therebetween, (c) a squeezing mechanism to squeeze molding sand, comprising an upper squeezing means having a plurality of upper segmented-squeeze feet and a lower squeezing means having a plurality of lower segmented-squeeze feet, wherein the plurality of upper and lower segmented-squeeze feet (6a, 7a) are insertable into each opening of the cope flask and the drag flask respectively, which openings are at the opposite side from the match plate, wherein the squeezing mechanism allows the match plate to be held between the cope flask and the drag flask, and wherein the squeezing mechanism can support and rotate the cope flask and the drag flask so that the mechanism allows the cope flask and the drag flask to be rotated clockwise or counterclockwise in a perpendicular plane about a supporting shaft and so that the cope flask and the drag flask holding the match plate therebetween can be perpendicular or horizontal, (d) a driving mechanism to rotate the squeezing mechanism clockwise or counterclockwise, and (e) a sand-supplying mechanism to fill the molding spaces defined by the match plate and the plurality of upper and lower segmented-squeeze feet (6a, 7a) opposite to the match plate with the molding sand, through the sand-filling ports of the cope flask and the drag flask perpendicularly positioned by the driving mechanism, the apparatus further comprising a means (24, 25) for moving the segmented-squeeze feet (6a, 7a) so that the positions of the upper and the lower segmented-squeeze feet (6a, 7a), which positions determine the condition of the molding sand in the molding space when the space is filled with the molding sand, can be controlled according to the intervals between the match plate and each of the upper and the lower segmented-squeeze feet (6a, 7a) opposite to the match plate and so that after squeezing the molding sand, the molds are comprised of molding sand with a substantially uniform density, characterized by an air relief mechanism disposed at the match plate so as to completely fill a cornered bottom portion of the molding space formed by the pattern on the match plate with the molding sand. (a) a cope flask and a drag flask, wherein each flask (2, 3) has openings at its both ends and has an sand-filling port at its side wall, (b) a conveying mechanism for inserting a match plate between the cope flask and the drag flask and for taking it out from therebetween, (c) a squeezing mechanism to squeeze molding sand, comprising an upper squeezing means having a plurality of upper segmented-squeeze feet and a lower squeezing means having a plurality of lower segmented-squeeze feet, wherein the plurality of upper and lower segmented-squeeze feet (6a, 7a) are insertable into each opening of the cope flask and the drag flask respectively, which openings are at the opposite side from the match plate, wherein the squeezing mechanism allows the match plate to be held between the cope flask and the drag flask, and wherein the squeezing mechanism can support and rotate the cope flask and the drag flask so that the mechanism allows the cope flask and the drag flask to be rotated clockwise or counterclockwise in a perpendicular plane about a supporting shaft and so that the cope flask and the drag flask holding the match plate therebetween can be perpendicular or horizontal, wherein the plurality of upper and lower segmented-squeeze feet (6a, 7a) are insertable into each opening of the cope flask and the drag flask respectively, which openings are at the opposite side from the match plate, wherein the squeezing mechanism allows the match plate to be held between the cope flask and the drag flask, and wherein the squeezing mechanism can support and rotate the cope flask and the drag flask so that the mechanism allows the cope flask and the drag flask to be rotated clockwise or counterclockwise in a perpendicular plane about a supporting shaft and so that the cope flask and the drag flask holding the match plate therebetween can be perpendicular or horizontal, (d) a driving mechanism to rotate the squeezing mechanism clockwise or counterclockwise, and (e) a sand-supplying mechanism to fill the molding spaces defined by the match plate and the plurality of upper and lower segmented-squeeze feet (6a, 7a) opposite to the match plate with the molding sand, through the sand-filling ports of the cope flask and the drag flask perpendicularly positioned by the driving mechanism,