Karel Špillar (21 November 1871 – 7 April 1939) was a Czech painter and graphic artist.
The following years were mostly devoted to small orders, but he returned to large decorative paintings in 1899, when he collaborated with Jan Preisler on panels for the pavilion of the Czech Chamber of Commerce at the upcoming Exposition Universelle in Paris.
He worked with Preisler again, at the Central Hotel in Prague, then with Jaroslav in the meeting hall at the Italian Court in Kutná Hora (1901).
There, he was influenced by the works of Puvis de Chavannes, which was reflected in his entry at a competition to design a new curtain for the Vinohrady Theatre in 1905.
After Jaroslav's death in 1917, he spent his holidays at his brother's villa in Pec, sketching landscapes.