PURPOSE: To provide the carriage having high strength even if the carriage is formed thin by forming a part of a disk placing surface and the other surface respectively of a metal and resin.

CONSTITUTION: A central part 96 of the disk placing surface which is the disk placing surface of 8cm, etc., of the carriage 58 for disk placement is formed of aluminum and the part of the carriage 58 including the outer peripheral part 97 of the remaining placing surface is formed of the resin. A guide projecting part 55, recessed part 165, engaging projection 167, etc., of the outer peripheral part 97 are easily made by the constitution of not integrally forming the entire part of the aluminum. The carriage for displacement having the high strength is thus obtd. even if the carriage is formed thin.