Relationship between tiger-striped flow mark with same phase patterns appeared in injection moldings of polypropylene (PP)/talc compounds and molecular characteristics, especially molecular weight distribution of PP has been investigated. Usual tiger-striped flow mark pattern observed on one side of injection moldings of PP/talc compounds shows alternately glossy and cloudy phases in the direction of flow and the phases on the other side of moldings reverses with different gloss. But the flow mark patterns of some PP/talc compounds are quite different from the usual one. The glossy and cloudy parts on both sides of injection moldings have same phase pattern. We speculated the different flow mark patterns appeared in the injection moldings would result from the different flow behaviors of flow front during the injection stage of injection molding process. We also found that the flow mark of PP/talc compounds composed of PP with wide molecular weight distribution was same phase pattern on both sides. In this study we would like to discuss a relationship between molecular characteristics of three PPs and the behavior of the gross and skin layer thickness change appeared in these moldings.