Convent Bukit Nanas (CBN) (Malay: Sekolah Menengah Kebangsaan (SMK) Convent Bukit Nanas) is an all-girls secondary school located at Bukit Nanas in the heart of Kuala Lumpur, Malaysia. Established in 1899, it is one of the oldest schools in Kuala Lumpur and is widely known as CBN. On 16 January 2006, the Malaysian Ministry of Education launched the ‘cluster school’ program defined as schools which have been identified as being excellent within their cluster from the aspect of school management and student excellence. CBN was selected as a cluster school.

CBN consists of a secondary school and two primary schools. Administration of the secondary and primary schools separated in 1958. CBN has classes from Form 1 through to Form Six for girls aged 12 to 18. Girls enter CBN after they have completed their primary education in SRK Convent Bukit Nanas School I and School II (Malay: Sekolah Rendah Kebangsaan Convent Bukit Nanas). These primary schools have classes from Year 1 through Year 6 for girls aged 6 to 12.

On 16 December 2008, Pos Malaysia issued set of four commemorative stamps and first day cover, honoring four Premier Schools of Malaysia - Convent Bukit Nanas and Victoria Institution in Kuala Lumpur, SMK St. Thomas in Kuching and SMK All Saints in Sabah.