In Jainism, Ambika (Sanskrit: अम्बिका, Odia: ଅମ୍ବିକା Ambikā "Mother") or Ambika Devi (अम्बिका देवी Ambikā Devī "the Goddess-Mother") is the yakshini "dedicated attendant deity" or Śāsana Devī "protector goddess" of the 22nd Tirthankara, Neminatha. She is also known as Ambai, Amba, Kushmandini and Amra Kushmandini. She is often shown with one or more children and often under a tree. She is frequently represented as a pair (Yaksha Sarvanubhuti on the right and Kushmandini on the left) with a small Tirthankar image on the top. The name is also a common epithet of the Hindu goddess Parvati.

The name Ambika is a Sanskrit word, that translates to mother.

According to Jain texts, Ambika is said to have been an ordinary woman named Agnila who became a Goddess. She lived in the city of Girinagar with her husband, Soma and her two children, Siddha and Buddha as per the Śvetāmbara tradition, or with her husband Somasarman and her two children, Shubhanakar and Prabhankara as per the Digambara tradition.

One day, Soma invited Brahmins to perform Śrāddha (funeral ceremony) and left Agnila at home. Varadatta, the chief disciple of Neminatha, was passing by and asked for food from Agnila to end his month-long fast. Soma and Brahmins were furious at her as they considered the food to be impure now. Soma drove her out of the house along with her children; she went up a hill.

She was blessed with power for her virtue, the tree she sat down under became a Kalpavriksha, wish-granting tree, and dry water tank started overflowing with water. Demi-gods were angry at the treatment meted out to Angila and decided to drown the entire village, but her house. After seeing this Soma and the Brahmins felt this was because of her saintliness and begged her for forgiveness. Upon seeing her husband approach her, afraid of punishment, a scared Angila committed suicide by jumping off the cliff, but she was instantly reborn as Goddess Ambika. Her husband was reborn as a lion and he came to her, licked her feet and became her vehicle. Neminatha initiated her two sons and Ambika became Neminatha's yakshi.

Ambika is the yakshi of Neminatha with Sarvahna (according to Digambara tradition) or Gomedha (according to Śvētāmbara tradition) as yaksha.

A number of images and temples of Ambika are found in India. Goddess Ambika along with Padmavati and Chakreshvari is held as an esteemed deity and along with Tirthankaras, is worshipped by Jains. Ambika and Padmavati are associated with tantric rituals. These tantric rites involves yantra-vidhi, pitha-sthapana and mantra-puja. Ambika is also called Kalpalata and kamana devi a goddess that fulfils. At Vimal Vasahi, Ambika is carved kalpalata, a wish fulfilling creeper. Ambika is also associated with childbirth and prosperity. Ambika is also worshiped as Kuladevi or gotra-devi. Ambika is the kula-devi of the Porwad(Pragvat) Jain community. While she is worshipped by all Śvetāmbara Murtipujaka Jains, she is specially revered by the Porwads.

According to a Digambara legend, after completing construction of Gommateshwara statue, Chavundaraya organised a mahamastakabhisheka with five liquids, milk, tender coconut, sugar, nectar and water collected in hundreds of pots but liquid could not flow below the navel of the statue. Kushmandini appeared disguised as a poor old woman holding milk in the shell of half of a white Gullikayi fruit and the abhisheka was done from head to toe. Chavundaraya realised his mistake and did abhishek without pride and arrogance and this time abhisheka was done from head to toe. Worship of Kushmandini devi or Ambika is an integral part of Jain rituals in Shravanabelagola.