Laser plasma X-ray sources are currently used for various applications as a high-brightness source. The main problem, however, is the debris production from the source that causes degradation of the X-ray optics. To overcome this problem we pick up a high pressure gas-puff target created by pulsed injection of high-density gas through a nozzle. Measurements of X-ray spectra from the plasmas produced by using a gas puff target irradiated with a Nd: YAG laser are described. The obtained results would also allow to develop an efficient and debrisless laser-produced X-ray source to be used for the applications in various fields.