Patent ID: 7731674

Claim:
A walking assistance device, comprising: a load transmit portion; a foot attachment portion attached to a user's foot; a leg link connected to the load transmit portion via a first joint portion located at an upper end thereof and connected to the foot attachment portion via a second joint portion located at a lower end thereof, and having a middle third joint portion which operates in such a way that a distance between the first joint portion and the second joint portion is variable; a drive source to drive the third joint portion; and a battery for the drive source, wherein a force generated for the leg link from the third joint portion driven by the drive source is transferred to a user's trunk via the load transmit portion, wherein the drive source and the battery are disposed in such a way that a frontal plane passing through the second joint portion lies in an anteroposterior width of the drive source and an anteroposterior width of the battery in a normal state of the leg link where a user stands upright.