To provide an engine driving type oil-free compressor capable of facilitating maintenance and inspection work of each equipment stored in a package and reducing noise leaking to the outside of the package.

The inside of the package 10 is divided by a partition plate 13 having a communicating port 14, and an engine 40 is arranged on a partition plate 13 side in a main chamber 10a in the package 10 formed on a side wall 11a side in such a way that the direction of axial line of an output shaft of the engine 40 crosses the partition plate 13 orthogonally. A compressor main body 20 is connected with the output shaft of the engine 40 on the side wall 11a side of the package 10, and an after-cooler 52 and a coolant cooler 53 are arranged in parallel between a main body 20 and a side wall 11a. A tank chamber 10c is formed between an air exhaust duct 10b communicating with the communicating port 14 formed in the partition plate 13 and a side wall 11b on the other side in a space of the package 10 formed on the side wall 11b side on the other side.