Laser-induced breakdown spectra (LIBS) produced in ambient air and pure gases with tightly focused, micro Joule, fhmtoseeond Ti: sapphire laser pulses have been studied experimentally. The breakdown region typically measures around 10μm in diameter and 120μm in length. Both line spectrum and blue-shifted continuum spectrum arc rccorded [br air, N2, O2, Ar, Kr, and Xe when the optical intensity reaclles 1014W/cm2, using 40 fspulses. It is also found that the profile of the continuum varies only slightly for different gases. For a given gas the continuum profile changes along different positions of the narrow micro plasma track. In parficular, the blue-shifted broad confinuum is stronger at the initial posgion of the plasma track (closer to the focal lens), whereas the line spectrum is mare dominant when light collection is made at the fnrther end of the plasma track. Unlike the results reported by others for longer pulses, higher energy and also larger plasma zone, the majority of line spectrum we obtained is found around 800nm, the central wavelength of the input Ti: sapphire pulses.