  Let $g$ and $h$ be transcendental entire functions and let $f$ be a
continuous map of the complex plane into itself with $f\circ g=h\circ f.$ Then
$g$ and $h$ are said to be semiconjugated by $f$ and $f$ is called a
semiconjugacy. We consider the dynamical properties of semiconjugated
transcendental entire functions $g$ and $h$ and provide several conditions
under which the semiconjugacy $f$ carries Fatou set of one entire function into
the Fatou set of other entire function appearing in the semiconjugation. We
have also shown that under certain condition on the growth of entire functions
appearing in the semiconjugation, the set of asymptotic values of the
derivative of composition of the entire functions is bounded.
