An
oxygen concentrating device easy to assemble and able to reduce production costs. The
oxygen concentrating device (101) comprises a plurality of components including an adsorbing column (102) storing adsorbent capable of selectively adsorbing
nitrogen contained in material air, a storing tank (103) for temporarily storing concentrated
oxygen gas generated in the adsorbing column (102), a gas transferring means (104) for transferring material air, concentrated
oxygen gas or
exhaust gas, a
solenoid valve (106) for opening / closing or switching a gas flow path connected to the adsorbing column (102), and a control means (108) for controlling the gas transferring means and / or the
solenoid valve, resin supports (109) for positioning and supporting the plurality of components at predetermined locations, and a plurality of resin covers (110) covering the outer sides of the supports (109), the supports (109) being formed by injection molding.