Mouse housing with integrally formed holding portion and key portion

A housing structure with integrally formed holding portion and key portion is disclosed. The housing structure includes a main body made of a flexible material; a key portion arranged on and integrally formed with the main body to be depressed to enter a command therethrough; and an elongated recess arranged as an interface between the main body and the key portion for allowing the key portion to be bent down relative to the main body to enter the command. Owing to the integration of the entire housing structure, the manufacturing and assembling of the housing are relatively easy, and the cost is relatively low. Moreover, the housing can be made smooth and beautiful.