NO-NO is a contemporary art gallery based in the neighbourhood of Estrela in Lisbon, Portugal.  The gallery was founded in April 2016 by Ana Raquel Ruivo and Luís Castanheira Loureiro, with its initial name of ACERVO. In 2020 and following a gradual change of direction in the project, the gallery moved to its current premises and its name changed to NO·NO.

NO·NO is a member of EXHIBITIO  - Associação Lusa de Galeristas and NADA New Art Dealers Alliance. Its programme relies heavily on curatorships and external contributions, collaborations and invitations as vehicles for the exchange of contemporary artistic production and is coordinated with regular participation in international fairs.