An upper nest and a lower nest of an umbrella framework each comprise a nest body and a plurality of pins around the nest body. Each pin is integrally connected with the nest body via a connecting section. Each middle disk comprises a pin, which is disposed on an outer wall of a sleeve and integrally connected with the sleeve. Each long bone has an upper end thereof coupled with a pin of the upper nest, and the sleeve of each middle disk is fitted over a middle part of the long bone. Each short bone has an upper end thereof coupled with the pin of the middle disk, and a lower end thereof coupled with a pin of the lower nest. Thereby, an improved member structure for an umbrella framework is formed.