We report the experimental observation of deterministic chaos in an He-Ne laserat 0.6328μm by varying the discharge current.Strange attractor of laser system in the recon-structed phase-space picture has been obtained.The mechanism of the phenomena was dis-cussed. We report the experimental observation of deterministic chaos in an He-Ne laserat 0.6328 μm by varying the discharge current. Trance attractor of laser system in the recon-structed phase-space picture has been obtained. The mechanism of the phenomena was dis-cussed.