been interposed between a main frame and an orbiting scroll of the scroll compressor of fig3 and fig6 is a sectional view taken along line u2018 i i u2019 in fig5 which illustrates a state that a rotation preventing member has been interposed between a main frame and an orbiting scroll as shown a scroll compressor having a rotation preventing member according to the present invention comprises a main frame 120 fixedly installed at an inner space 111 of a hermetic casing 110 and a sub frame 130 fixed to one side of the main frame 120 in a horizontal direction the sub frame 130 may be coupled to an inner circumferential surface of the casing 110 or may be integrally formed with the casing 110 a shaft accommodating hole 121 for supporting a crankshaft 150 to be later explained in a radius direction is formed at the center of the main frame 120 and a first bearing 122 for supporting the crankshaft 150 in a radius direction is installed at the shaft accommodating hole 121 a driving motor 140 is fixedly installed between the main frame 120 and the sub frame 130 at the inner space 112 of the casing 110 a coil may be wound on a stator 141 of the driving motor 140 in a concentrated manner the driving motor 140 may be implemented as a constant motor having the same rotation speed of a rotor 142 alternatively the driving motor 140 may be implemented as an inverter motor having a variable rotation speed of the rotor 142 with consideration of multi functions of a refrigerating apparatus to which the scroll compressor is applied a crank shaft 150 rotatably coupled to an orbiting scroll 170 to be later explained and transmitting a rotational force of the driving.