B. Leza or Beleza (1905 – 1958) was a Cape Verdean writer, composer and a singer.
He was born in Mindelo on the island of São Vicente. B. Leza is the one who innovated morna by introducing passage chords which he used frequently playing morna. This also known as the Brazilian halftone. He wrote several poems that appeared in the Claridade review.
His style and his work which started to have success in the 1950s, marked the Cape Verdean music for the next twenty years. He composed dozens of mornas, one of these titled Eclipse, Miss Perfumado, Resposta de Segredo Cu Mar and Lua Nha Testemunha, in which legend had it was composed in a hospital bed just days before his death.