  The problem of determining the pion electromagnetic formfactor $F(q^2)$ in
the space-like region from the value of its modulus in the time-like region is
solved by the formfactor analyticity. If $F(q^2)$has no zeroes in the complex
plane then the formfactor in the space-like region is determined uniquely. If
$F(q^2)$has zeroes in the complex plane $q^2$ it can be obtained in the
space-like region within narrow limits using experimental data from the
time-like region. The formfactor phase $\phi(s)$ which coincides with the
$P$-wave phase $\delta^1_1(s)$ of the $\pi\pi$ scattering is calculated. The
value of the pion radius has been improved.
