A hermetically sealed rotary compressor characterized by comprising: a compressor body comprising a well-closed container; an electric motor unit accommodated in an upper part of the well-closed container; a compression mechanism section comprising a cylinder forming a cylinder chamber (Sa) and a roller driven by the electric motor unit through a shaft to perform an eccentric motion in the cylinder chamber (Sa), the compression mechanism section being accommodated in a lower end portion of the well-closed container; four support legs disposed on the lower end portion of the well-closed container, each of the support legs comprising a mounting hole for mounting the hermetically sealed rotary compressor to a mounting spot by fixtures, and the support legs being arranged at regular intervals along the circumference of the well-closed container; and an accumulator disposed on a lateral part of the well-closed container, the lateral part corresponding to a center between the two support legs adjacent to each other among the four support legs, where Rb is a support point radius of the support legs, namely the distance from a longitudinal central axis of the compressor body to a center of the mounting hole of each of the support legs, Rc is an outer radius of the compressor body, namely the distance from the longitudinal central axis of the compressor body to the outer peripheral surface of the compressor body, L is the distance from the longitudinal central axis of the compressor body to a longitudinal central axis of the accumulator, and θ is an angle of 45°, namely half an angle of 90° formed between adjacent four support legs about the longitudinal central axis, characterized in that an overall height H of the compressor body, which is a height measured from a bottom surface of the support legs to an upper end of the compressor body, is set to be at least 2.5 times greater than an outer diameter D of the compressor body (H/D ≥ 2.5), a height Hg of a center of gravity of the compressor body, which is a height measured from the bottom surface of the support legs to the center of gravity of the compressor body, is set to be 1/2 or less than the overall height H of the compressor body (Hg ≤ H/2), and the hermetically sealed rotary compressor satisfies the following expressions: Rc / cosθ < Rb, Rb < L. a compressor body comprising a well-closed container; an electric motor unit accommodated in an upper part of the well-closed container; a compression mechanism section comprising a cylinder forming a cylinder chamber (Sa) and a roller driven by the electric motor unit through a shaft to perform an eccentric motion in the cylinder chamber (Sa), the compression mechanism section being accommodated in a lower end portion of the well-closed container; four support legs disposed on the lower end portion of the well-closed container, each of the support legs comprising a mounting hole for mounting the hermetically sealed rotary compressor to a mounting spot by fixtures, and the support legs being arranged at regular intervals along the circumference of the well-closed container; and an accumulator disposed on a lateral part of the well-closed container, the lateral part corresponding to a center between the two support legs adjacent to each other among the four support legs, where Rb is a support point radius of the support legs, namely the distance from a longitudinal central axis of the compressor body to a center of the mounting hole of each of the support legs, Rc is an outer radius of the compressor body, namely the distance from the longitudinal central axis of the compressor body to the outer peripheral surface of the compressor body, L is the distance from the longitudinal central axis of the compressor body to a longitudinal central axis of the accumulator, and θ is an angle of 45°, namely half an angle of 90° formed between adjacent four support legs about the longitudinal central axis, characterized in that an overall height H of the compressor body, which is a height measured from a bottom surface of the support legs to an upper end of the compressor body, is set to be at least 2.5 times greater than an outer diameter D of the compressor body (H/D ≥ 2.5), a height Hg of a center of gravity of the compressor body, which is a height measured from the bottom surface of the support legs to the center of gravity of the compressor body, is set to be 1/2 or less than the overall height H of the compressor body (Hg ≤ H/2), and the hermetically sealed rotary compressor satisfies the following expressions: Rc / cosθ < Rb, Rb < L.