FIXING DEVICE

The present invention relates to a fastening device (1) for fixing a first part (10) onto a second part (20) having a hole, comprising a latch (100) and an anchor (200), wherein the latch (100) comprises a head (120) and a stem (140), and the anchor (200) comprises a body (220) having an insertion zone (250) in an axial direction of the body (220) to receive the stem (140) of the latch (100). [0002] The anchor (200) comprises at least two branches (240) projecting from the body (220) of the anchor (200), which move toward the axis of the body (220) when the anchor (200) enters the hole of the second part (20), and the branches (240) each comprise at least two stages (242). When the anchor (200) is introduced into the hole of the second part (20), the second part is between the cover (270) and one of the stages (242) of each branch (240).