Connection device for inserting in a recess in a board, in particular in a recess in a table top (1 a), comprising the following features: - a first and a second flap (5; 5a, 5b) are provided, which can be pivoted between a closed and an open position, for which purpose the two flaps (5; 5a, 5b) comprise their associated pivot axes (9a, 9b) in the region of or in the vicinity of their respectively remote outer or longitudinal sides (7a, 7b), - the two pivot axes (9a, 9b) extend in parallel, - in the closed position of the two flaps (5; 5a, 5b), said flaps are side by side and are arranged to form a plane by means of their upper faces, the two flaps (5; 5a, 5b) each being provided with an upper face and a lower face (15a, 15b), - a connection unit comprising at least one power socket for supplying power and/or at least one network-connection interface for establishing a network connection to a PC to be connected and/or a telephone interface is provided on the underside of the first flap, - the connection unit can be pivoted about the pivot axis between the closed and open positions of the first flap by means of the first flap, - in an operational position of the connection unit, the first flap is pivoted out of its closed position into the open position to the extent that the upper face of the connection unit, which is on the lower face of the first flap, comes to rest above the plane, - a retaining and/or latching device which the second flap comprises is provided, by means of which device the two flaps (5a, 5b) and thus the connection unit provided on the underside of the first flap can be kept in the operational position, for this purpose, the connection unit comprises a projection device or is connected to such a projection device, underneath which a closing edge of the second flap that is provided opposite the pivot axis or a corresponding projection engages and is connected to the second flap and/or integrally formed thereon, by means of which the two flaps (5a, 5b) and thus the connection unit connected to the first flap are secured against pivoting into the closed position, characterised in that - both the first flap together with its connection unit provided on the lower face and the second flap can be pivoted in opposite directions about their respective pivot axes (9a, 9b) out of their common closed position into an open position such that, in the operational position of the connection unit, the first and the second flap (5a, 5b) form, together with said connection unit, a basic shape that is trapezoidal in cross section, and said flaps are symmetrical to a central plane of symmetry which is perpendicular to the plane between the two flaps (5; 5a, 5b), and are oriented to extend towards one another, preferably oriented at an angle of from 50° to 80° relative to the plane formed by the closed flaps (5a, 5b). - a first and a second flap (5; 5a, 5b) are provided, which can be pivoted between a closed and an open position, for which purpose the two flaps (5; 5a, 5b) comprise their associated pivot axes (9a, 9b) in the region of or in the vicinity of their respectively remote outer or longitudinal sides (7a, 7b), - the two pivot axes (9a, 9b) extend in parallel, - in the closed position of the two flaps (5; 5a, 5b), said flaps are side by side and are arranged to form a plane by means of their upper faces, the two flaps (5; 5a, 5b) each being provided with an upper face and a lower face (15a, 15b), - a connection unit comprising at least one power socket for supplying power and/or at least one network-connection interface for establishing a network connection to a PC to be connected and/or a telephone interface is provided on the underside of the first flap, - the connection unit can be pivoted about the pivot axis between the closed and open positions of the first flap by means of the first flap, - in an operational position of the connection unit, the first flap is pivoted out of its closed position into the open position to the extent that the upper face of the connection unit, which is on the lower face of the first flap, comes to rest above the plane, - a retaining and/or latching device which the second flap comprises is provided, by means of which device the two flaps (5a, 5b) and thus the connection unit provided on the underside of the first flap can be kept in the operational position, for this purpose, the connection unit comprises a projection device or is connected to such a projection device, underneath which a closing edge of the second flap that is provided opposite the pivot axis or a corresponding projection engages and is connected to the second flap and/or integrally formed thereon, by means of which the two flaps (5a, 5b) and thus the connection unit connected to the first flap are secured against pivoting into the closed position, - both the first flap together with its connection unit provided on the lower face and the second flap can be pivoted in opposite directions about their respective pivot axes (9a, 9b) out of their common closed position into an open position such that, in the operational position of the connection unit, the first and the second flap (5a, 5b) form, together with said connection unit, a basic shape that is trapezoidal in cross section, and said flaps are symmetrical to a central plane of symmetry which is perpendicular to the plane between the two flaps (5; 5a, 5b), and are oriented to extend towards one another, preferably oriented at an angle of from 50° to 80° relative to the plane formed by the closed flaps (5a, 5b).