"Feels So Good" is the title of a 1978 instrumental song by the American flugelhorn player Chuck Mangione. The song was both written and produced by Mangione and is the title track from his 1977 album.
The album version of "Feels So Good" runs almost ten minutes, but an edit trimming the song to 3 minutes 28 seconds was released as a single in early 1978. The single reached #4 on the Billboard Hot 100 chart in June of that year after spending a week atop the Billboard adult contemporary chart in May. The song was also nominated for a Grammy Award in the category Record of the Year at the ceremony held in 1979, losing out to "Just the Way You Are" by Billy Joel.
The song has been referenced often on the animated TV series King of the Hill. Mangione was quoted describing the editing of the original version of his song as "major surgery."
The lead sheet for "Feels So Good" is available in The Real Book Volume 2.