  The first estimate of the upper bound $\mu(\pi)\leq42$ of the irrationality
measure of the number $\pi$ was computed by Mahler in 1953, and more recently
it was reduced to $\mu(\pi)\leq7.6063$ by Salikhov in 2008. Here, it is shown
that $\pi$ has the same irrationality measure $\mu(\pi)=\mu(\alpha)=2$ as
almost every irrational number $\alpha>0$.
