PROBLEM TO BE SOLVED: To provide a composite sheet that is able to reduce the area of contact with an object.SOLUTION: A composite sheet 1 has joint parts 31, 32, where a first sheet 1 and second sheet 2 are joined, the first sheet 1 projecting in a non-joint part surrounded by the joint parts 31, 32 such that a first projecting part 41, second projecting part 42, and third projecting part 43 of different heights are formed. A first direction first line 11 in which the first projecting part 41 alternates with the third projecting part 43 in the first direction X and a first direction second line 12 in which only the second projecting parts 42 are arranged are arranged alternately in the second direction Y. A second first line 21 in which the first projecting part 41 alternates with the second projecting part 42 and a second direction second line 22 in which the second projecting part 42 alternates with the third projecting part 43 are arranged alternately in the first direction X.
