In Jainism, especially in the Śvetāmbara Mūrtipujak tradition, a gaccha is a monastic lineage or order (sampraday) of sādhus and sādhvīs.

Why was a gaccha formed?

1. To preserve a pure guru‑śiṣya (teacher–disciple) lineage

After Bhagwān Mahāvīr and the early gaṇadhars, different groups of monks settled in different regions. Each group followed a particular ācārya. Over time, these lines became known as “gacchas” so that it was clear which scriptures, commentaries, and discipline (maryādā) that group followed.

1. To maintain discipline and organization

Each gaccha has: - its own ācārya / gacchādhipati (spiritual head), - a defined way of observing vows, saṃyam, and daily practice, - its own internal rules for dikshā, travel, residence, and study. Forming a gaccha helps keep monks and nuns united under one accepted code of conduct.

1. To protect and transmit Jain āgamas and traditions

Different regions emphasized different texts, styles of preaching, and commentaries. Gacchas helped preserve these teachings accurately and pass them down generation to generation without mixing them with non‑Jain ideas.

1. To guide lay followers (śrāvaks–śrāvikās)

Laypeople often connect to a specific gaccha through their guru. The gaccha gives: - clear religious guidance, - a recognizable sangh (monastic group) to serve, - continuity of pratishthā, pūjā‑paddhati, and festivals.

1. Historical reason

Over many centuries, differences about strictness of practice, interpretation of some rules, or reforms led to the arising of separate gacchas (for example, Tapā Gaccha, Kharatar Gaccha, etc.). The aim was still the same: better practice of Jain dharma and ahimsā, but with slightly different discipline or emphasis.

Digambar vs Śvetāmbara

• The gaccha system is mainly Śvetāmbara (Mūrtipujak).
• Digambar tradition also has monastic lineages, but they usually don’t use the word “gaccha” in the same structured way.

You can read more about Śvetāmbara gacchas and their structure here