A traditional stringed musical instrument from Norway, with some similarity to the dulcimer.

The instrument has only one melody string, but has additional drone strings (or 'bourdons'). There are usually 7 or 8 drone strings on modern instruments, but older ones had fewer, most often 4 drones. The combination of the lone melody string and the multiple drone strings gives the langeleik a distinctively rich sound.

The melody is played on the melody string with one hand, while the other hand plucks the other strings to produce a set drone chord.

The frets under the melody string are placed such that it can only play a diatonic major scale. The drone strings are also tuned to the triad of the melody string (nominally C, E and G although really somewhere around A, C# and E). Since the instrument cannot play a chromatic scale nor be easily tuned to other pitches, it is very limited in its ability to play along with other instruments and/or more harmonically complex music.

The oldest known langeleik in existence is dated 1524. It is clearly related to other European instruments, but mostly to the German scheitholt and the French epinette des Vosges, among others.

Early langeleiks are basically rectangular in shape, and often have an open bottom. They usually have 5 or 6 strings. Modern langeleiks are somewhat curved and wider at the middle, to give a louder sound.