A sheet conveyance apparatus comprising: a first conveyance unit which includes a first upper conveyance guide facing an upper surface of a sheet, a first lower conveyance guide facing a lower surface of the sheet and a conveyance member conveying the sheet along the first upper conveyance guide and the first lower conveyance guide, and forms a first sheet conveyance path; a second conveyance unit which is disposed below the first conveyance unit in parallel, includes a second upper conveyance guide facing the upper surface of the sheet, a second lower conveyance guide facing the lower surface of the sheet and a conveyance member conveying the sheet along the second upper conveyance guide and the second lower conveyance guide, and forms a second sheet conveyance path; and an apparatus main body in which the first conveyance unit and the second conveyance unit are housed, characterized in that the second conveyance unit can be drawn out horizontally to a front side of the apparatus main body along a front-and-rear direction perpendicular to a sheet conveyance direction with respect to the apparatus main body, the second upper conveyance guide of the second conveyance unit includes: a guide main body part turnable upward and downward with respect to the apparatus main body with a rear end edge as a turning support shaft and a front end edge as a turning end (75b1); and a movable guide part coupled to the turning end (75b1) of the guide main body part via a hinge part in a turnable manner. a first conveyance unit which includes a first upper conveyance guide facing an upper surface of a sheet, a first lower conveyance guide facing a lower surface of the sheet and a conveyance member conveying the sheet along the first upper conveyance guide and the first lower conveyance guide, and forms a first sheet conveyance path; a second conveyance unit which is disposed below the first conveyance unit in parallel, includes a second upper conveyance guide facing the upper surface of the sheet, a second lower conveyance guide facing the lower surface of the sheet and a conveyance member conveying the sheet along the second upper conveyance guide and the second lower conveyance guide, and forms a second sheet conveyance path; and an apparatus main body in which the first conveyance unit and the second conveyance unit are housed, characterized in that the second conveyance unit can be drawn out horizontally to a front side of the apparatus main body along a front-and-rear direction perpendicular to a sheet conveyance direction with respect to the apparatus main body, the second upper conveyance guide of the second conveyance unit includes: a guide main body part turnable upward and downward with respect to the apparatus main body with a rear end edge as a turning support shaft and a front end edge as a turning end (75b1); and a movable guide part coupled to the turning end (75b1) of the guide main body part via a hinge part in a turnable manner. a guide main body part turnable upward and downward with respect to the apparatus main body with a rear end edge as a turning support shaft and a front end edge as a turning end (75b1); and a movable guide part coupled to the turning end (75b1) of the guide main body part via a hinge part in a turnable manner.