The utility model discloses an elastic armpit crutch, which comprises an upper support, a spring buffer tube and a lower support rod, wherein the bottom of the upper support is connected with the spring buffer tube, and the lower part of the spring buffer tube is connected with the lower support rod. When the elastic armpit crutch is used for walk aiding, the rigid impact of a bottom end onto the ground is buffered by a spring, impact force generated to an armpit of a user can be greatly reduced, particularly the elastic strength and an elastic stroke can be adjusted, the elastic armpit crutch can be suitable for different requirements of the user, the comfort of the user is improved, the structure is simple, used materials are few, the weight of the crutch is not increased much, and the production is easy.