| Pod Pajštúnom | |
| Iucn Category: | IV |
| Area: | 1.414197 km²[1] |
| Established: | 1984 |
Pod Pajštúnom is a nature reserve in the Slovak municipalities of Stupava and Borinka in the Malacky District. The nature reserve covers an area of of forests in the Little Carpathians. It has a protection level of 5 under the Slovak nature protection system. The nature reserve is part of the Little Carpathians Protected Landscape Area.
The nature reserve was created to protect forest communities of beech, oak-hornbeam and lime-maple with their natural species composition and structure as well as the protection of pioneer and subpannonic grass-herb stands on carbonate substrate.