The Aire–Fruges and Rimeux-Gournay–Berck railway (French: Chemins de fer d'Aire à Fruges et de Rimeux-Gournay à Berck; CF du ARB) was a 1,000 mm (3 ft 3+3⁄8 in) metre gauge railway from Aire-sur-la-Lys to Berck, in the Pas-de-Calais department of France. It opened in 1891 and closed in 1955.