Abstract: Eleven elements (Mg, K, Ca, Fe, Ni, Cu, Zn, Rb, Sr, Ba, Pb) of several environmental matrices were determined by micro-laser ablation inductively coupled plasma mass spectrometry. Among these samples are the reference materials (CRMs): No. 3 Chlorella, No. 7 Tea Leaves and No. 9 Sargasso certified by the National Institute for Environmental Studies (NIES) (Japan) and the standard reference materials (SRM) of National Institute of Standard and Technology (NIST). 1573 Tomato Leaves and 1568 Rice Flour. The calibrations were based on the individual elemental sensitivities derived from matrix-matched standards: NIES No. 1 Pepperbush and NIES No. 10-c Rice Flour, respectively. The powdered sample was simply tightly stuck on the surface of an adhesive tape (about 8mm×8mm) to form a thin layer. No additional sample preparation is necessary. The analytical method has high sensitivity and the procedure is simple and fast.