Arílson Gilberto da Costa (born 11 June 1973), simply known as Arílson, is a Brazilian professional football^[1] coach and former player who played as a midfielder.

Arílson for Esportivo de Bento Gonçalves, Grêmio, 1. FC Kaiserslautern, Internacional, Palmeiras, Real Valladolid, Universidad de Chile, 15 de Novembro, Portuguesa (SP), América Mineiro, Club Santa Fe, Mogi Mirim and Atlético Tubarão. He also represented the Brazilian national side in seven international games between 1995 and 1996.

Arílson began playing football in the Bento Gonçalves' youth system, and became a professional with Grêmio. He moved to Germany to play for 1. FC Kaiserslautern but, due to adaptation problems, wanted to return to Brazil shortly after his move. Arílson initially tried to re-join Grêmio, but the club would not meet Kaiserslautern's asking price. Instead, he transferred to Grêmio's arch-rivals Internacional.^[2]

Arílson earned seven caps between late 1995 and early 1996 following his good showings with Grêmio, but it all came to an end at the 1996 CONMEBOL Pre-Olympic Tournament in which, being unused in his team's matches and wanting to rejoin Kaiserslautern for the 1995–96 DFB-Pokal semifinals, he attempted to request to be released from the national team, but was denied; still, he left Brazil's training camp in Tandil without permission and flew to Germany, only to find he could not rejoin his club until after the Pre-Olympic Tournament was over. His attitude incensed the Brazilian team manager, Mário Zagallo, who declared that Arílson would never earn another cap in retaliation.^[3]