  We have already reported the first result on the all-particle spectrum around
the knee region based on data from 2000 November to 2001 October observed by
the Tibet-III air-shower array. In this paper, we present an updated result
using data set collected in the period from 2000 November through 2004 October
in a wide range over 3 decades between $10^{14}$ eV and $10^{17}$ eV, in which
the position of the knee is clearly seen at around 4 PeV. The spectral index is
-2.68 $\pm$ 0.02(stat.) below 1PeV, while it is -3.12 $\pm$ 0.01(stat.) above 4
PeV in the case of QGSJET+HD model, and various systematic errors are under
study now.
