A double-walled container with a bottle shape including a mouth, a trunk, and a bottom, the double-walled container comprising: an outer layer body that constitutes an outer shell of the double-walled container ; an inner layer body that is accommodated inside the outer layer body and configured to be deformed to undergo volume reduction; and a straight slit that is provided in a pinched-off portion and that passes through the outer layer body , the pinched-off portion being formed in the bottom due to pinch-off using a splittable mold in blow molding, wherein the bottom is provided, on an inner side in a radial direction of an outer edge portion thereof serving as a ground-contacting surface, with a substantially cross-shaped recess that is concave toward the mouth, and the recess is configured by a first-direction recess portion that extends along an extending direction of the slit and a second-direction recess portion that intersects with the first-direction recess portion , and the slit is provided in a region in which the first-direction recess portion and the second-direction recess portion intersect with each other, characterised in that the first-direction recess portion and the second-direction recess portion each have a substantially elliptical shape in a plan view thereof, and that each of the first-direction recess portion and the second-direction recess portion has a depth from the outer edge portion serving as the ground-contacting surface that increases gradually from an outer side to an inner side in the radial direction and that is maximum in the region in which the first-direction recess portion and the second-direction recess portion intersect with each other. an outer layer body that constitutes an outer shell of the double-walled container ; an inner layer body that is accommodated inside the outer layer body and configured to be deformed to undergo volume reduction; and a straight slit that is provided in a pinched-off portion and that passes through the outer layer body , the pinched-off portion being formed in the bottom due to pinch-off using a splittable mold in blow molding, wherein the bottom is provided, on an inner side in a radial direction of an outer edge portion thereof serving as a ground-contacting surface, with a substantially cross-shaped recess that is concave toward the mouth, and the recess is configured by a first-direction recess portion that extends along an extending direction of the slit and a second-direction recess portion that intersects with the first-direction recess portion , and the slit is provided in a region in which the first-direction recess portion and the second-direction recess portion intersect with each other, characterised in that the first-direction recess portion and the second-direction recess portion each have a substantially elliptical shape in a plan view thereof, and that each of the first-direction recess portion and the second-direction recess portion has a depth from the outer edge portion serving as the ground-contacting surface that increases gradually from an outer side to an inner side in the radial direction and that is maximum in the region in which the first-direction recess portion and the second-direction recess portion intersect with each other. <EOS>