A pallet in a rectangular shape in a plan view, the pallet comprising: four corner columns that are provided at four corners of the pallet; middle columns, each being provided in middle between each pair of the corner columns arrayed along a side of the pallet; a center column that is provided at a center of the pallet; an upper deck that is arranged to link upper ends of the corner columns, the middle columns and the center column; and a lower deck that is arranged to link lower ends of the corner columns, the middle columns and the center column, wherein upper surfaces of the corner columns, the middle columns, the center column and the upper deck define an upper deck surface on which an article or articles are mountable, and lower surfaces of the corner columns, the middle columns, the center column and the lower deck define a lower deck surface that can be grounded to a mounting surface, the pallet further comprising fork insertion structures that are defined by a lower surface of the upper deck, an upper surface of the lower deck and side faces of the corner columns, the middle columns, and the center column and are configured such that forks of fork-equipped lift means are insertable into the fork insertion structures from four surfaces constituting an outer circumferential surface of the pallet, wherein the lower deck has a thickness that is less than a thickness of the upper deck, and a height of the pallet that is a distance between the upper surface of the upper deck and the lower surface of the lower deck is equal to or less than 100 mm, the pallet further comprising outer circumferential projections that are formed along a peripheral edge of the upper deck surface, wherein the outer circumferential projections include each an extended portion that is formed by extending the upper deck surface toward an outer circumferential side, and a convex support that is protruded upward from the extended portion, wherein the height of the convex supports in an insertion-corresponding region that is a region of the outer circumferential projections located above the fork insertion structures and a thickness of the lower deck are configured to be an identical length, and the height of the convex supports in a remaining region, which is a region other than the insertion-corresponding region of the outer circumferential projections is greater than the height of the convex supports in the insertion-corresponding region. four corner columns that are provided at four corners of the pallet; middle columns, each being provided in middle between each pair of the corner columns arrayed along a side of the pallet; a center column that is provided at a center of the pallet; an upper deck that is arranged to link upper ends of the corner columns, the middle columns and the center column; and a lower deck that is arranged to link lower ends of the corner columns, the middle columns and the center column, wherein upper surfaces of the corner columns, the middle columns, the center column and the upper deck define an upper deck surface on which an article or articles are mountable, and lower surfaces of the corner columns, the middle columns, the center column and the lower deck define a lower deck surface that can be grounded to a mounting surface, the pallet further comprising fork insertion structures that are defined by a lower surface of the upper deck, an upper surface of the lower deck and side faces of the corner columns, the middle columns, and the center column and are configured such that forks of fork-equipped lift means are insertable into the fork insertion structures from four surfaces constituting an outer circumferential surface of the pallet, wherein the lower deck has a thickness that is less than a thickness of the upper deck, and a height of the pallet that is a distance between the upper surface of the upper deck and the lower surface of the lower deck is equal to or less than 100 mm, the pallet further comprising outer circumferential projections that are formed along a peripheral edge of the upper deck surface, wherein the outer circumferential projections include each an extended portion that is formed by extending the upper deck surface toward an outer circumferential side, and a convex support that is protruded upward from the extended portion, wherein the height of the convex supports in an insertion-corresponding region that is a region of the outer circumferential projections located above the fork insertion structures and a thickness of the lower deck are configured to be an identical length, and the height of the convex supports in a remaining region, which is a region other than the insertion-corresponding region of the outer circumferential projections is greater than the height of the convex supports in the insertion-corresponding region.