The medial plantar artery (internal plantar artery), much smaller than the lateral plantar artery, passes forward along the medial side of the foot.

Medial plantar artery
The plantar arteries. Deep view. (Medial plantar artery visible at upper left.)
The plantar arteries. Superficial view. (Medial plantar artery visible at center left.)
Details
Source	Posterior tibial artery
Supplies	Sole
Identifiers
Latin	arteria plantaris medialis
TA98	A12.2.16.061
TA2	4734
FMA	43925
Anatomical terminology [edit on Wikidata]

It is at first situated above the abductor hallucis, and then between it and the flexor digitorum brevis, both of which it supplies.

At the base of the first metatarsal bone, where it is much diminished in size, it passes along the medial border of the first toe, anastomosing with the first dorsal metatarsal artery.

Small superficial digital branches accompany the digital branches of the medial plantar nerve and join the plantar metatarsal arteries of the first three spaces.