Hinge device for hinging a luggage compartment door on a body structure of a motor vehicle, comprising at least: - two hinge levers (104a, 104b) each fixed, at a first end (105a, 105b), to the luggage compartment door and each rotatably hinged, at a second end (106a, 106b), on the body structure of the vehicle, between a first open position of the luggage compartment door and a second closed position of the luggage compartment door, - two support members (108a, 108b) each secured to a hinge lever (104a, 104b) and intended to retain a first end (110a, 110b) of an associated balancing spring (111a, 111b), a second end (112a, 112b) of the balancing spring (111a, 111b) being fixed to the body structure of the vehicle, each support member (108a, 108b) comprising: - a support plate (113a, 113b) intended to be fixed by riveting (118a, 118b) to the associated hinge lever (104a, 104b), and - a support wire (114a, 114b) to which the end (110a, 110b) of the associated balancing spring (111a, 111b) is fixed, said wire (114a, 114b) being welded to the support plate (113a, 113b) and being configured so as to retain the balancing spring (111a, 111b) when the luggage compartment door passes from its open position to its closed position and vice versa, the hinge device being characterized in that - the support wire (114a, 114b) is configured so as to define a plurality of functional successive portions (119a, 119b; 120a, 120b; 121a, 121b; 122a, 122b; 123a, 123b), each support wire (114a, 114b) comprising, successively: - a first portion (119a, 119b) intended to be fixed by welding against the associated support plate (113a, 113b), - a second portion (120a, 120b) which is inclined with respect to the first portion (119a, 119b) in one and the same plane parallel to the support plate (113a, 113b) so as to offset the support wire (114a, 114b) with respect to the support plate (113a, 113b), - a third portion (121a, 121b) extending substantially perpendicularly to the second portion (120a, 120b) towards the rear of the vehicle, along a longitudinal axis of the vehicle, - a fourth portion (122a, 122b) which is inclined substantially at a right angle with respect to the third portion (121a, 121b) so as to again offset the support wire (114a, 114b) from the support plate (113a, 113b), - a fifth portion (123a, 123b) defining the free end of the support wire (114a, 114b) and delimiting an elbowed zone (124a, 124b) with the fourth portion (122a, 122b), which elbowed zone (124a, 124b) defines an attachment zone for the end (110a, 110b) of the associated balancing spring (111a, 111b). - two hinge levers (104a, 104b) each fixed, at a first end (105a, 105b), to the luggage compartment door and each rotatably hinged, at a second end (106a, 106b), on the body structure of the vehicle, between a first open position of the luggage compartment door and a second closed position of the luggage compartment door, - two support members (108a, 108b) each secured to a hinge lever (104a, 104b) and intended to retain a first end (110a, 110b) of an associated balancing spring (111a, 111b), a second end (112a, 112b) of the balancing spring (111a, 111b) being fixed to the body structure of the vehicle, - a support plate (113a, 113b) intended to be fixed by riveting (118a, 118b) to the associated hinge lever (104a, 104b), and - a support wire (114a, 114b) to which the end (110a, 110b) of the associated balancing spring (111a, 111b) is fixed, said wire (114a, 114b) being welded to the support plate (113a, 113b) and being configured so as to retain the balancing spring (111a, 111b) when the luggage compartment door passes from its open position to its closed position and vice versa, - the support wire (114a, 114b) is configured so as to define a plurality of functional successive portions (119a, 119b; 120a, 120b; 121a, 121b; 122a, 122b; 123a, 123b), each support wire (114a, 114b) comprising, successively: - a first portion (119a, 119b) intended to be fixed by welding against the associated support plate (113a, 113b), - a second portion (120a, 120b) which is inclined with respect to the first portion (119a, 119b) in one and the same plane parallel to the support plate (113a, 113b) so as to offset the support wire (114a, 114b) with respect to the support plate (113a, 113b), - a third portion (121a, 121b) extending substantially perpendicularly to the second portion (120a, 120b) towards the rear of the vehicle, along a longitudinal axis of the vehicle, - a fourth portion (122a, 122b) which is inclined substantially at a right angle with respect to the third portion (121a, 121b) so as to again offset the support wire (114a, 114b) from the support plate (113a, 113b), - a fifth portion (123a, 123b) defining the free end of the support wire (114a, 114b) and delimiting an elbowed zone (124a, 124b) with the fourth portion (122a, 122b), which elbowed zone (124a, 124b) defines an attachment zone for the end (110a, 110b) of the associated balancing spring (111a, 111b).