Eldo Di Lazzaro was born on February 21, 1902, in Trapani, Italy, and grew up in Trivento, Molise. He learned to play the piano from his father, an army officer and music enthusiast. Di Lazzaro began his career as a pianist in ballrooms and started composing in the early 1920s. His breakthrough came in 1932 with the song "Campane," establishing his unique style, "canzone alla Di Lazzaro," which blended classical Italian music with folk influences.

Di Lazzaro's most famous composition, "Reginella campagnola," was covered by Glenn Miller as "The Woodpecker Song" and became a popular football chant. Other notable works include "Chitarra romana," "La piccinina," "Rosabella del Molise," and "Il passerotto," which was a finalist at the Sanremo Music Festival. He was also known for composing incidental music and songs in the Neapolitan dialect.

Di Lazzaro married Fulvia Donati in 1934 and continued to compose music that resonated internationally. Despite his success, he suffered from heart problems and passed away on November 29, 1968, in Genoa, Italy, at the age of 66. His legacy includes a significant contribution to Italian music, with compositions that have been featured in films and covered by various artists worldwide.