  We will show the Cheeger-Colding segment inequality for manifolds with
integral Ricci curvature bound. By using this segment inequality, the almost
rigidity structure results for integral Ricci curvature will be derived by a
similar method as in \cite{CC1}. And the sharp H\"older continuity result of
\cite{CoN} holds in the limit space of manifolds with integral Ricci curvature
bound.
