  We argue that the existence of the electroweak monopole predicts the
existence of the electroweak string in the standard model made of
monopole-antimonopole pair separated infinitely apart, which carry the
quantized magnetic flux $4 \pi n/e$. We show how to construct such quantized
magnetic flux string solution. Our result strongly indicates that genuine
fundamental electromagnetic string could exist in nature which could actually
be detected. We discuss the physical implications of our result in cosmology.
