To obtain a phosphorescent particle which can reduce the amt. of the phosphorescent pigment to be used and possesses high luminescence brightness and excellent visibility in a dark place by coating the surface of an inorg. or org. particle having a total light transmittance of not less than 50% with a phosphorescent pigment.

A phosphorescent pigment is applied onto the surface of an inorg. particle (a glass particle) or an org. particle (a synthetic resin particle) having a total light transmittance of not less than 50% to prepare a phosphorescent particle which can reduce the amt. of the phosphorescent pigment to be used and possesses high luminescence brightness and excellent visibility in a dark place. This particle is used to form a phosphorescent road marking material. Glass particles usable herein include, e.g. particles of soda lime glass, borosilicate glass, and potash glass. Synthetic resin particles usable herein include particles of (meth)acrylic resin and epoxy resin. According to the above constitution, light energy of sunlight or an electric light is effectively absorbed or stored in the phosphorescent pigment, the amt. of the phosphorescent pigment to be used may be smaller than that in the prior art, the luminescence brightness is high, and the visibility in a dark place is excellent.