A glass sheet composite includes: two or more sheets; and an intermediate layer between at least a pair of the sheets. At least one of the pair of sheets is a glass sheet. The intermediate layer satisfies all of the following properties: (1) the intermediate layer has a thickness of 20 μm or less, (2) a compressive shear storage modulus at a temperature of 25° C. is 1.0×104 Pa or less, and (3) at the temperature of 25° C. and 1 Hz, the compressive shear storage modulus is higher than a compressive shear loss modulus. The glass sheet composite has a loss coefficient at 25° C. of 0.01 or more, and a sheet-thickness-direction longitudinal wave acoustic velocity of 4.0×103 m/s or more,