The molten state of a low molecular weight isotactic polypropylene was studied by means of the viscoelastic method as well as the observation of magnetic orientation. The melt viscosity remained at a higher level in the temperature ranging between the melting point (ca. 170 degreesC) and the temperature up to 70 degreesC higher than the melting point, depending on the heating rate. The melt viscosity measured at constant temperatures in this temperature range decreased with time. The rate of decrease depended on the temperature. These observations strongly suggested that some ordered structures exist even above the melting point. Magnetic orientation was observed for the samples melted in the magnet (6 T) at temperatures above the melting point. This observation implied the existence of anisotropic structures, supporting the observation made in viscoelastic measurements.