(Sanskrit: वज्रसत्त्व, Tibetan: རྡོ་རྗེ་སེམས་དཔའ། Dorje Sempa, short form is རྡོར་སེམས། Dorsem, is a bodhisattva in the Mahayana, Mantrayana/Vajrayana Buddhist traditions. In the Japanese Vajrayana school of Buddhism, Shingon, Vajrasattva is the esoteric aspect of the bodhisattva Samantabhadra and is commonly associated with the student practitioner who through the master's teachings, attains an ever-enriching subtle and rarefied grounding in their esoteric practice. In Tibetan Buddhism Vajrasattva is associated with the sambhogakāya and purification practice.
Vajrasattva appears principally in two Buddhists texts: the Mahavairocana Sutra and the Vajrasekhara Sutra. In the Diamond Realm Mandala, Vajrasattva sits to the East near Akshobhya Buddha.
In some esoteric lineages, Nagarjuna was said to have met Vajrasattva in an iron tower in South India, and was taught tantra, thus transmitting the esoteric teachings to more historical figures.