This paper proposes concurrent event propagation technique for timing analysis. The technique makes it possible to find several input vectors and sensitizable paths at the same time. The concurrent event propagation technique is based on the event driven simulation and the timing analysis technique with boolean equations. The technique propagates as many events as possible at the same time while preventing propagation of boolean terms which do not sensitize paths. Since events do not propagate through false paths, the longest path which successfully propagates events to one of the primary outputs is one of the longest sensitizable paths. The technique can speed up timing analysis by unifying path sensitization and maximum delay calculation.