Kaplna (Hungarian: Erzsébetkápolna) is a village and municipality in western Slovakia in Senec District in the Bratislava Region.

The first written reference to the village comes from a document signed by the Hungarian king Bela IV in 1244 AD as "Capulna".

The name of the village was derived from a unique wo-tower Catholic church built in Romanesque architecture sometimes in the first half of the eleventh century.

During the Ottoman invasion the village was abandoned, only to be resettled in the sixteenth century by Croatian colonists.

In 2003, Kaplna has founded a folk song festival taking place every September, called Folkovanie v Kaplne.