To provide a high-quality electric rotating machine, which facilitates handling of an insulator and prevents reduction of the slot area, and a hermetic sealed compressor using the electric rotating machine for an electric motor.

This electric rotating machine is composed of first and second insulating moldings 13 and 14, which serve as an insulator 12; the molding 13 is formed in such a manner as to have an approximately U-shaped cross section around a teeth part 2 and cover the teeth part 2 throughout the length of at least one end surface 2a, in a laminating direction, of the teeth part 2 and both-side slot wall surface parts 10a continuing from the end surface 2a; the molding 14 having an approximately I-shaped cross section along the teeth part 2 is disposed in such a manner as to cover the other end surface 2b, in the laminating direction, of the teeth part 2; and ends of the molding 14 are engaged with U-shaped openings 13a of the molding 13.