A device in connection with sleep apnoea, includes a dental splint (1) designed to engage with the jaws of the user in the position of use of the device and the device moreover includes elements (10, 11) for delivering air to the nostrils of the user from an external air source and a holder element (3) for supporting the elements (10, 11) for the delivery of air, the holder element (3) being connected to the dental splint (1). The holder element (3) is connected to the dental splint (1) by way of elements (7, 9) for adjusting the distance between the dental splint (1) and the holder element (3).