The main objective of this study was to formulate an ergonomic design factor for 6-to-18-month baby carrier from simulated loading point data and physical parameters of an average Thai elderly person. The research steps were as follows: (1) reviewing the literature on 6-to-18-month baby carrier designs; (2) simulating the forces acting on a few selected baby carriers and on the body of an average Thai elderly person carrying them; and (3) synthesizing ergonomic design factors based on load-bearing data as well as the physical parameters of an average Thai elderly person. Four ergonomic design factors were synthesized: 1) their shoulder and hip posture while they are using the carrier, 2) the seat and backrest of the baby carrier, 3) the load-bearing points on the body of the carrying person, and 4) the type of baby carrier. Our findings may benefit designers of cushion seat and baby stroller.

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