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 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 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 . <EOS>