Ekadanta Ganapati is the twenty-second form among the 32 forms of Lord Ganesha described in Hindu scriptures. Lord Ekadanta is regarded as the second form among the eight principal forms of Lord Ganesha, known as the Ashta Vinayaka. One who worships this form of Lord Ganesha never suffers from scarcity and all their undertakings are completed without obstacles. Lord Ekadanta Ganapati removes all hindrances and difficulties that arise in the path of His devotees.

Lord Ganesha is known as Ekadanta because one of His tusks is broken. According to ancient legend, once Lord Parashurama arrived at Mount Kailasa to meet Lord Shiva. At that time, Lord Shiva was resting and Lord Ganesha was guarding the entrance to Kailasa. Despite repeated requests by Parashurama, Ganesha did not allow Him to enter. Eventually, the disagreement escalated and in anger, Parashurama struck Lord Ganesha with His Parashu, i.e., axe, breaking one of His tusks. From that time onward, Lord Ganesha became renowned in all the Lokas as Ekadanta.
According to the Ashta Vinayaka origin story described in the Mudgala Purana, Lord Ganesha manifested in the Ekadanta form to destroy the demon Madasura. Terrified by Lord Ekadanta, Madasura accepted defeat and retreated permanently to the Patala Loka.
According to the Amanta Hindu Panchang, the Krishna Paksha Chaturthi of the Vaishakha month and according to the Purnimanta Hindu Panchang, the Krishna Paksha Chaturthi of the Jyeshtha month is observed as Ekadanta Sankashti Vrat. On this day, special worship of the Ekadanta form of Lord Ganesha is performed.
In Vedic astrology, Anuradha Nakshatra is associated with the Ekadanta Ganapati form of Lord Ganesha. Therefore, it is believed that those born under Anuradha Nakshatra attain remarkable results by worshipping Ekadanta Ganapati. Many devotees perform this worship to remove afflictions related to Anuradha Nakshatra and to obtain auspicious outcomes.
In this form, Lord Ganesha's abdomen is depicted as larger than in His other forms, symbolizing that the entire universe is contained within Him. Lord Ekadanta Ganapati is described as having Nila-Shyam Varna, i.e., a dark bluish-black complexion and Chaturbhuja Rupa, i.e., a four-armed form. His belly is extremely large. In His four hands, He holds a Parashu, a Japa Mala, i.e., rosary, a Laddu and His own broken tusk.
Shri Ekadanta Ganapati is another form of Lord Ganesha, and therefore His family is the same as that of Lord Ganesha. His father is Lord Shiva and His mother is Goddess Parvati. Lord Kartikeya is His brother and Ashoka Sundari is His sister.
Mula Mantra -
ॐ एकदन्त गणपतये नमः।
Om Ekadanta Ganapataye Namah।
Dhyana Mantra -
अथ एकदन्तगणपतिध्यानम् -
लंबोदरंश्यामतनुंगणेशंकुठारमक्षस्रजमूर्ध्वगात्रम्॥
सलड्डुकंदंतमधःकराभ्यांवामेतराभ्यांचदधानमीडे॥1॥ श्यामवर्णः॥
Atha Ekadantaganapatidhyanam -
Lambodaranshyamatanunganeshankutharamakshasrajamurdhvagatram॥
Saladdukandantamadhahkarabhyamvametarabhyanchadadhanamide॥1॥ Shyamavarnah॥
Padachchheda -
लंबोदरं श्यामतनुं गणेशं
कुठारमक्षस्रजमूर्ध्वगात्रम्।
सलड्डुकं दंतमधः कराभ्यां
वामेतराभ्यां च दधानमीडे॥
Lambodaram Shyamatanum Ganesham
Kutharamakshasrajamurdhvagatram।
Saladdukam Dantamadhah Karabhyam
Vametarabhyam Cha Dadhanamide॥
Meaning - "I adore Lord Ekadanta Ganesha, who has a large belly and a dark complexion, who holds an axe and Akshamala, i.e., a rosary, whose one hand is raised upward and who holds a Laddu and His broken tusk in His lower hands."