Seat skin material and seat including same

A seat skin material that includes a three-dimensional knitted fabric constructed of a front layer knitted fabric, a back layer knitted fabric, and connecting thread connecting the front layer knitted fabric and back layer knitted fabric, wherein the outer surface of the front layer knitted fabric is the seating surface, the thermal conductance value of the seat skin material is 8.0 W/m2·° C. or greater, the air permeability from the back layer knitted fabric toward the front layer knitted fabric of the three-dimensional knitted fabric is 50 cc/cm2/sec or greater, the heat dissipation value is 5.0 W/m2·° C. or greater, the level of contact cooling on the seating surface is 75 W/m2·° C. or greater, and the front layer knitted fabric includes multifilament yarn, and a stitch density M of the front layer knitted fabric is 11,000 to 21,000 stitches per 2.54 cm-square×√(decitex), wherein the stitch density M is represented by a formula (1):

• M=N×√D (1)
• wherein N is a number of stitches in the front layer knitted fabric per 2.54 cm-square, and D is a total fineness in decitex of the multifilament yarn forming one stitch of the front layer knitted fabric.