  We propose a formalism to obtain the electroweak sphaleron, which is one of
the static classical solutions, using the gradient flow method. By adding a
modification term to the gradient flow equation, we can obtain the sphaleron
configuration as a stable fixed point of the flow in the large flow time.
Applying the method to the $SU(2)$-Higgs model (the Weinberg angle $\theta_W$
is $0$) in four dimensions, we obtain the sphaleron configuration whose energy
coincides with previous studies numerically. We can also show that the
Chern-Simons number of the solution has a half-integer.
