To provide an adsorption equipment which prevents an abrupt pressure drop in an adsorption cylinder and a careless operation stop by limiting a discharge from the equipment and enables obtaining the improvement of reliability by keeping the adsorption performance even when a large amount of compressed gas is used on the usage side in the outside.

This adsorption equipment introduces the gas which is compressed by a compressor 1 into a first adsorption cylinder 10 packed with an adsorbent or a second adsorption cylinder 11 via a pressure controller 3 and, after adsorbing and removing a part of components in the compressed gas such as water and carbon dioxide by means of adsorbent, supplies the gas to the outside. Further, the adsorption equipment is provided with a main orifice 18 which is set below a value of resistance which converges the quantity of circulation of the compressed gas after the specified components are adsorbed and ensures the usage flow rate at an irreducible minimum and above the value of resistance which maintains the inside of the adsorption cylinder to a prescribed pressure even on the maximum usage quantity, between the outlet side of the first and second adsorption cylinders and the outer usage side.