The present invention provides a scroll compressor, to solve the performance deteriorating problem generated by over pressure loss as the communicating path connected to the discharge outlet is narrower regardless whether or not the coolant gas in the compressing chamber achieves the prescribed pressure. Nearly simultaneously before or after the invention is separated by a first compression chamber (15a), the discharge outlet (18) passes across the vortex disc teeth (13a) of rotary scroll discs (13) to lead to the structure of the first compression chamber, as the discharge outlet (18) forms an opening directly in the first compression chamber (15a), and the communicating path can be thoroughly ensured added with the gap between the vortex disc teeth of the two rotary scroll discs, therefore the over-compression loss can be reduced.