| Secondo Casadei | |
| Landscape: | yes |
| Birth Name: | Aurelio Casadei |
| Alias: | Secondo Casadei |
| Birth Date: | 1 April 1906 |
| Birth Place: | Sant'Angelo di Gatteo, Italy |
| Death Place: | Forlimpopoli, Italy |
| Genre: | Liscio |
| Occupation: | Musician, violinist, composer, arranger, bandleader |
| Instrument: | Violin |
| Years Active: | 1924–1970 |
| Label: | Casadei Sonora |
| Website: | www.secondocasadei.it |
Aurelio Casadei, known as Secondo Casadei (1 April 1906 – 19 November 1971) was an Italian musician, violinist, arranger, composer and bandleader. He is considered the most important exponent of liscio (literally "smooth"), an Italian style of dance and folk music born in Emilia-Romagna.[1]
Casadei is best known for being the author of the famous popular song "Romagna mia". His nephew is the musician and composer Raoul Casadei.