A pressing device (9, 109, 209) to be mounted in a sewing machine, the sewing machine including: a bed section on which a workpiece is to be placed; and a presser bar on which the pressing device is to be mounted, the presser bar extending in an up-down direction and being configured to be urged downward, the pressing device comprising: a first member (7, 170, 270) having a mounting part (73, 173, 273) configured to be mounted on the presser bar, the first member being movable in the up-down direction along with the presser bar in a mounted state in which the pressing device is mounted on the presser bar; a second member (6, 160, 260) configured to support a presser foot configured to press the workpiece placed on the bed section downward, the presser bar being configured to apply, through the second member, a pressing force to the presser foot downward in the mounted state; characterized in that further comprising: a third member (4, 140, 240) disposed between the first member and the second member in the up-down direction in the mounted state, the third member being movable in the up-down direction in the mounted state; a gap-adjusting member (88, 150, 288) configured to adjust a gap between the first member and the third member by contacting at least one of the first member and the third member; an urging member configured to urge the second member and the third member away from each other with an urging force smaller than the pressing force of the presser bar; and a guide part (67, 167, 262) configured to guide movement of the second member and the third member relative to the first member. a first member (7, 170, 270) having a mounting part (73, 173, 273) configured to be mounted on the presser bar, the first member being movable in the up-down direction along with the presser bar in a mounted state in which the pressing device is mounted on the presser bar; a second member (6, 160, 260) configured to support a presser foot configured to press the workpiece placed on the bed section downward, the presser bar being configured to apply, through the second member, a pressing force to the presser foot downward in the mounted state; characterized in that further comprising: a third member (4, 140, 240) disposed between the first member and the second member in the up-down direction in the mounted state, the third member being movable in the up-down direction in the mounted state; a gap-adjusting member (88, 150, 288) configured to adjust a gap between the first member and the third member by contacting at least one of the first member and the third member; an urging member configured to urge the second member and the third member away from each other with an urging force smaller than the pressing force of the presser bar; and a guide part (67, 167, 262) configured to guide movement of the second member and the third member relative to the first member. a third member (4, 140, 240) disposed between the first member and the second member in the up-down direction in the mounted state, the third member being movable in the up-down direction in the mounted state; a gap-adjusting member (88, 150, 288) configured to adjust a gap between the first member and the third member by contacting at least one of the first member and the third member; an urging member configured to urge the second member and the third member away from each other with an urging force smaller than the pressing force of the presser bar; and a guide part (67, 167, 262) configured to guide movement of the second member and the third member relative to the first member.