[Object] An object to be solved by the invention is to improve a retroreflective characteristic of a quadrilateral element that is a cube-corner element, which has reflective lateral surfaces including two trapezoidal reflective lateral surfaces and one pentagonal or isosceles-triangular reflective lateral surface, and which has a projection shape of a quadrangle when projected onto a common plane and is particularly to provide a cube-corner retroreflective article provided with a quadrilateral element excellent in an entrance angle characteristic and a rotation angle characteristic.[Solving Means] There is provided a cube-corner retroreflective article provided with a number of cube-corner retroreflective element pairs each formed by a pair of cube-corner retroreflective elements sharing one side, each of the cube-corner retroreflective elements having reflective lateral surfaces including two trapezoidal reflective lateral surfaces and one pentagonal or isosceles-triangular reflective lateral surface, and having a projection shape of a quadrangle when projected onto a common plane, wherein ratios (rHA/rHC and rHB/rHC) between a length (rHC) of a ridge (HC) shared by the trapezoidal reflective lateral surfaces (HAFC and HBGC) and lengths (rHA and rHB) of other ridges (HA and HB) are in a range of 0.5 to 1.5.