To provide a thick object of isotactic polypropylene which is excellent in transparency and mechanical properties.

A transparent sheet of this invention is a polypropylene sheet formed by blending a crystal nucleator, and has an elastic modulus of 1.2 GPa or higher, a fracture strength of 90 MPa or higher, and a haze value of 11% or lower. A sheet is made by adding the crystal nucleator to polypropylene, extrusion-molding the crystal nucleator added polypropylene into a sheet, crystallizing the sheet on the surface of a chilled roll at a temperature of not lower than (Tm-90)°C and not higher than (Tm-40)°C, wherein Tm is the fusing point of the polypropylene and rolling the product under a specified condition at a temperature within the range of (αc-30)°C to (αc+20)°C, wherein αc is the crystal dispersion peak temperature of the loss factor at a frequency of 1 Hz in the dissonance forced oscillation dynamic viscoelasticity temperature curve. The sheet is not less than 1.2 GPa in elastic modulus and 90 MPa in maximum stress, and 11% or less in haze value.