To surely hold a handbag such as a personal computer bag and a business bag on user's back.

A lap lid part 2, a back part, a bag placing part 4, and a front part 5 are sequentially connected to each other to form a bag receiving implement body 1. A bag 18 is placed in the bag receiving implement body, and after one end of the lap lid part 2 penetrates through a handle part 20 of the bag 18, the one end is engaged with the front part 5 to receive the bag. The bag is held on the user's back by a shoulder belt provided on the back part and a waist belt 8 connected to both lower edges of the front part 5.