In Jainism, “non‑Jain marriage” usually means a Jain marrying a person who is not Jain.

Main religious points in simple language:

1. No strict ban in Jain scriptures

- Jain Agams and core philosophy do not say “a Jain must marry only a Jain” or “marriage with a non‑Jain is a sin.” - Marriage is seen as a gṛhastha (householder) social institution; the focus is on your conduct and vows, not the label of religion.

1. What really matters spiritually

After marriage, Jain Dharma expects you to: - Follow ahimsa: strict vegetarian (ideally no meat, fish, eggs, alcohol, and as far as possible avoid himsa in food and lifestyle). - Follow satya, asteya, brahmacharya, aparigraha: truthfulness, honesty, faithfulness to one partner, and simple/non‑possessive living. - Give respect and space to Jain worship and practices: Navkār Mantra, Paryushan / Das Lakshan, temple visits, samayik, pratikraman as per your capacity.

1. If a Jain marries a non‑Jain, key practical questions

Before marriage, both should honestly discuss: - Will the non‑Jain partner support pure vegetarian (and ideally Jain) food at home? - Will they respect no alcohol / no night‑outs that disturb vrata/upvās, etc.? - How will children be raised: Will they learn Jain values, visit derasar, keep basic vows? - Are both ready to avoid things clearly against Jain Dharma (killing animals, hunting, cruel professions, etc.)?

1. Difference between Dharma and society

- Dharma side: No clear prohibition on marrying a non‑Jain, as long as Jain principles are protected. - Society/family side: Many Jain families prefer a Jain partner to make dharmic life, food rules, and festivals easier. This is a social preference, not a scriptural order.

1. Digambar / Shvetambar view

- Both main traditions agree on the same basic principles: - For monks/nuns: complete celibacy, no marriage at all. - For laypeople: marriage is allowed; what matters is dharmic living. - Some sub‑communities may be more strict socially, but this is tradition, not core doctrine.

Simple conclusion: From a Jain‑Dharma point of view, a Jain can marry a non‑Jain, but it is spiritually safe and beneficial only if both partners are genuinely ready to live a life as close as possible to Jain principles, especially ahimsa and brahmacharya for householders. If these cannot be protected, then the marriage will create many inner conflicts and more karma.

You can read a related explanation here: “Marriage in non Jain”