An earphone device (1) comprising a main body (14) to be inserted in the outer ear (28) of a user, a conchal wall stabilizer (4) extending from the main body (14) and adapted to engage the conchal wall (24) of the ear (28), the conchal wall stabilizer (4) being able to assume different positions in relation to the main body (4). The conchal wall stabilizer (4) is a bi-stable mechanism, which is movable from a first stable position via a dead point to a second stable position. Spring means (32) biases the conchal wall stabilizer (4) towards the first stable position, when the conchal wall stabilizer (4) is positioned on a first side of the dead point, and towards the second stable position, when the conchal wall stabilizer (4) is positioned on a second side of the dead point.