A pointer device for an indicator instrument, in particular for a vehicle; the device comprising: - a light-guide body, that is defined by a single piece, is made with light-guide material, has a rotation axis and comprises: a) an external surface adapted to receive light from a light source; b) a hub comprising a base surface and a light transmission portion, which axially ends with at least one light emission area, at the opposite axial side in respect to said base surface; c) a pointer, which radially protrudes outwards from said hub; - a shield, that covers said base surface at least partially so as to block the light transmitted from said hub; - a cap, that is defined by a single piece separated from said light-guide body, is mounted on said hub in a fixed position, and comprises: a) an intermediate portion radially arranged inwards in respect to said light transmission portion; and b) a lateral portion that surrounds said light transmission portion; said cap further comprising: - at least one through opening radially arranged between said intermediate portion and said lateral portion and aligned with said light emission area for allowing the light to exit through said cap; - connection portions (50a,50b,55a,55b) extending radially and joining said intermediate portion to said lateral portion; characterised in that said light transmission portion comprises a pair of first end portions which are spaced apart from said pointer, in a circumferential direction, by respective first gaps; said connection portions comprising first connection portions engaging, respectively, said first gaps. - a light-guide body, that is defined by a single piece, is made with light-guide material, has a rotation axis and comprises: a) an external surface adapted to receive light from a light source; b) a hub comprising a base surface and a light transmission portion, which axially ends with at least one light emission area, at the opposite axial side in respect to said base surface; c) a pointer, which radially protrudes outwards from said hub; a) an external surface adapted to receive light from a light source; b) a hub comprising a base surface and a light transmission portion, which axially ends with at least one light emission area, at the opposite axial side in respect to said base surface; c) a pointer, which radially protrudes outwards from said hub; - a shield, that covers said base surface at least partially so as to block the light transmitted from said hub; - a cap, that is defined by a single piece separated from said light-guide body, is mounted on said hub in a fixed position, and comprises: a) an intermediate portion radially arranged inwards in respect to said light transmission portion; and b) a lateral portion that surrounds said light transmission portion; a) an intermediate portion radially arranged inwards in respect to said light transmission portion; and b) a lateral portion that surrounds said light transmission portion; - at least one through opening radially arranged between said intermediate portion and said lateral portion and aligned with said light emission area for allowing the light to exit through said cap; - connection portions (50a,50b,55a,55b) extending radially and joining said intermediate portion to said lateral portion; characterised in that said light transmission portion comprises a pair of first end portions which are spaced apart from said pointer, in a circumferential direction, by respective first gaps; said connection portions comprising first connection portions engaging, respectively, said first gaps.