This research to describe about garap technique instrument on gamelan sekaten. This is qualitative description research. The location and time this research at Keraton Surakarta and need three months between October until December 2019. This research focus on garap technique instrument at Keraton Surakarta. The data collection techniques obtained through observation, interviews and documentation. Data analysis use reduction, display and conclusions. The data validity was obtained through triangulation of data collection techniques. This research show that gamelan sekaten has two gamelan set there are Kyai Guntur Sari gamelan set dan Kyai Guntur Madu gamelan set. Kyai Guntur Sari gamelan set make from Sultan Agung and Kyai Guntur Madu gamelan set make from Paku Buwono IV. They are keep and safe Langen Keraton room at Keraton Surakarta. We must play on obligation gending such as: Ladrang Rambu, Ladrang Rangkung and Barang Miring. Every gamelan set has instruments: one rancak Bonang, two Panembung/Pengapit, two Saron, Demung, four Saron Barung, two Saron Penerus, two Kempyang, two Gong, and one Bedhug. The garap technique instrument on gamelan set sekaten such as Bonang, Saron Demung, Saron Barung, Saron Penerus, Kempyang, Bedhug, and Gong. Bonang has two pipilan and nibani pattern, Saron Demung and Saron Barung have mbalung and kinthilan pattern. Saron Penerus has nyacah pattern, Kempyang has ngedingi pattern, Bedhug have nrojol and nggandul pattern and Gong give final accent on ending gending performance. The Bonang racikan technique such as: patet lima bonang racikan techniques, patet enem bonang racikan techniques, patet barang bonang racikan techniques.

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