Born in 1973 in Villaverde, Madrid, Elejalde's stage debut took place at the Juan de Villanueva High School in Orcasitas.

[1] He earned a licentiate degree in Political Science while training as an actor at William Layton's lab.

[1] He further trained at the Teatro de La Abadía [es] under José Luis Gómez and studied stage direction at the RESAD.

[2][1] Some of his most important stage credits include those in Veraneantes, La función por hacer, and Misántropo.

[3] He was in a relationship with actress Bárbara Lennie, along with whom he performed in Magical Girl and different stage plays.