The 2005–06 OK Liga was the 37th season of the top-tier league of rink hockey in Spain.
Barcelona Sorli Discau finished the league as champion.
Sixteen teams joined the league.
The eight first teams at the end of the regular season qualified for the playoffs while the three last teams were relegated to Primera División.
Quarterfinals were played with a best-of-three format, while semifinals and final were played with a best-of-five series.
Seeded teams played games 1, 2 and 5 of the series at home.
The 2006 Copa del Rey was the 63rd edition of the Spanish men's roller hockey cup. It was played in Lloret de Mar between the seven first qualified teams after the first half of the season and Lloret as host team.[2]
23 years after its last title, Alnimar Reus Deportiu won its 6th cup.