Inside the church, the vaults and pillars are adorned with stucco decorations. The late Gothic main altar with natural-sized figures of St. Peter and St. Paul dates back to the 18th century and was rebuilt in the second half of the 19th century. Apart from that, you can see two beautiful crucifixes: a 17th-century crucifix in the church porch beneath the tower and a 18th-century crucifix on the external eastern wall of the presbytery. In the passage from the nave to the presbytery there is a marble baptismal font with a metal cover made in 1613. On the western wall of the nave and the southern pillar, you can see built-in marble epitaphs. The oldest one is a black marble epitaph devoted to the priest Hieronim Russocki; it was made in 1681, whereas others date back to the 19th century.