In an attractive match between two possession-based sides, an unfortunate mistake from Las Palmas keeper Javi Varas allowed Xabi Prieto to fire in the sole goal on the night into an open net for all three points in the 74th minute.
The two teams traded spells of possession, but Real Sociedad's Geronimo Rulli was clearly the more tested of the two keepers.
Tana's turns and Jonathan Viera's dribbles troubled the Sociedad goal but without the end product, despite recent addition Jese Rodriguez's best efforts and good performance.
Alan Halilovic was subbed in to try to go after the tying goal, yet the Basque side were much more comfortable since grabbing the lead and defended confidently to see the match out.
It was another missed opportunity at home for Las Palmas, who find themselves in a rough stretch of matches despite their attack-minded play.
