Morceaux de fantaisie (French for Fantasy Pieces; Russian: Пьесы Фантазии, Pyesy Fantazii), Op. 3, is a set of five piano solo pieces composed by Sergei Rachmaninoff in 1892. The title reflects the pieces' imagery rather than their musical form, as none are actual fantasies. The set was dedicated to Anton Arensky, his harmony teacher at the Conservatory.

Tempo Sostenuto—Tempo di Valse
Date of composition 1892
Premiered 1892, September 20th in Moscow, Russia by Sergei Rachmaninov
First published 1895 in Moscow, Russia
Type Serenade
Tonality B-flat Minor
Catalogue Op. 3
Instruments Piano
Autotranslations beta Sergueï Rachmaninov: Sérénade in Morceaux de Fantaisie en si bémol mineur, Op. 3
Sergej Vasil'evič Rachmaninov: Sérénade in Morceaux de Fantaisie in si bemolle minore, Op. 3
Sergei Wassiljewitsch Rachmaninow: Sérénade in Morceaux de Fantaisie b-moll, Op. 3