a turntable comprising a disk - shaped substrate and a portion for receiving a disk - shaped recording medium is disclosed . the disk - shaped substrate is shaped from a thermoplastic composite resin having a dynamic shear modulus , g &# 39 ;, of at least 1 . 5 × 10 10 dyne / cm 2 , a g 1 &# 39 ;/ g 2 &# 39 ; ratio of up to 1 . 5 , and a density of up to 2 . 0 g / cm 3 , and the receiving portion is formed on the top of the substrate from a thermoplastic elastomer having a hardness of 5 to 40 . the turntable has high dimensional precision and will experience reduced warpage . the turntable is capable of being revolved in a stable manner to ensure an increased precision in reading information . in addition , the turntable has a rapid access time and is capable of attaining a steady speed of revolution in a shorter period of time after the power has been switched on .