A baby carrier device configured to secure a baby an upper body of the person, and comprising a support pad, shoulder straps, and at least one vertical strap. The support pad is configured for receiving and supporting at least an upper body of the baby, and extends substantially vertically between a top end and a bottom end thereof and substantially horizontally between lateral sides thereof. The shoulder straps are joined to the support pad, and configured to removably join the support pad to shoulders of the person carrying the baby. The vertical strap is located at or near the bottom of support pad, has a top portion and a bottom portion, the bottom portion extending below the bottom end of the support pad, the vertical strap being configured for encircling a hip seat worn by the person carrying the baby to removably join the baby carrier to the hip seat.