Position adjusting devices for footrest of child car seat

The invention relates to a footrest of a child car seat, in particular to position adjusting devices for the footrest of the child car seat. According to the invention, the position adjusting devicesfor adjusting the height of assemblies arranged at a guide bar comprise clinging parts, pressuring parts, elastic parts and contact parts, wherein the clinging parts cling to the outer circumferentialsurface of the guide bar; the pressuring parts pressure the clinging parts; the clinging parts comprise first clinging plates clinging to the outer circumferential surface of the guide bar and secondclinging plates combined with the first clinging plates; each elastic part is positioned between the corresponding first clinging plate and the corresponding second clinging plate; each contact partis positioned between the corresponding first clinging plate and the corresponding second clinging plate and holds the corresponding elastic part; and the contact parts are in contact with the outer circumferential surface of th