An image recording apparatus comprises a carriage carrying a recording head for recording an image on a recording medium transported in a predetermined direction, first and second support members, disposed on an upstream side and a downstream side, respectively, in a transport direction of the recording medium, for supporting said carriage slidably by support surfaces thereof facing said recording head and an endless belt for moving said carriage reciprocally in a direction substantially orthogonal to the transport direction wherein said carriage comprises a first contact section that comes into contact with the support surface of said first support member, and a second contact section that comes into contact with the support surface of said second support member, and a height position of a joint section of said endless belt and said carriage is at substantially the same height as a position of center of gravity of said carriage.