To provide a baby chair capable of being adapted to tables of different thicknesses.

The baby chair has a structure wherein a seat 3 is attached to the outer side of a pair of upper arms 2, a base 2b is formed downward from the upper arms 2 to clip and fix the chair to the table 51 with the upper arms 2 and the supporting arm 4, multiple position adjustment holes 7 are made, the supporting arms can be inserted into the base 2b, and the plate spring 12 with a projection member 10 is inserted into the supporting arm 4.