A device for prevention of snoring in the form of a neck collar (1) with a middle section (2) for placement under the chin of a user, side sections (3, 4) connecting to said middle section and end parts (5, 6), optionally connectable to each other, consisting of a core of foam plastic contained in a covering. The foam plastic is a soft foam plastic, an opening (7) is formed in said middle section (2) and resilient means (14； 15； 27； 28) for adjustment of the height of the opening (7) and thereby the height of the middle section (2) are arranged in said opening (7).
