| Il mio sbaglio più grande | |
| Cover: | Il_Mio_Sbaglio_Più_Grande.jpg |
| Type: | single |
| Artist: | Laura Pausini |
| Album: | Tra te e il mare |
| B-Side: | "Un error de los grandes" (Spanish version) |
| Released: | 7 January 2001 |
| Genre: | Pop |
| Length: | 3:06 |
| Label: | Fri Records |
| Prev Title: | Tra te e il mare |
| Prev Year: | 2000 |
| Next Title: | Fidati di me |
| Next Year: | 2001 |
"Il mio sbaglio più grande" (English: My biggest mistake) is the second single of Italian singer Laura Pausini's Tra te e il mare. The song is translated into Spanish under the title "Un error de los grandes". On her English-language album From the Inside, the song has an English version (which originated both the Italian and the Spanish versions) named "Every Day Is a Monday", which is also included on her greatest hits album 20 - The Greatest Hits.
The music video of "Il mio sbaglio più grande" was shot in Milan and was directed by Marco Salom. The sister of Laura Pausini, Silvia Pausini makes a brief appearance in the video. The video shows Laura Pausini with her band on a stage in front of a live audience.