The present invention provides a resin composition comprising the component (A) liquid-crystalline polyester, and the component (B) a titanium oxide filler having a volume average particle diameter of 0.27 to 0.4 μm, wherein the component (B) is contained in an amount of from 5 to 110 parts by mass relative to 100 parts by mass of the component (A); a reflective plate of the resin composition, and a light-emitting device having the reflective plate. According to the resin composition of the present invention, it is possible to obtain a reflective plate exhibiting high reflectance of a visible light while keeping excellent mechanical strength of the liquid-crystalline polyester. Also, a light-emitting device excellent in characteristics such as brightness can be obtained using the reflective plate.