A machine for spreading out and loading flat articles of clothing, comprising: at least one conveyor belt moving in a loading direction; at least one pair of spreading clamps (4a, 4b) independently driven for moving along a guide rail transverse to said loading direction; and a plurality of loading stations, each provided with a pair of loading clamps (24a, 24b) driven for moving between a loading position, wherein said loading clamps (24a, 24b) are arranged to catch respective contiguous corners (A1, A2) of a flat article of clothing manually loaded by an operator in said loading station, and a delivery position, wherein the loading clamps (24a, 24b) transfer said corners (A1, A2) of said flat article of clothing to said pair of spreading clamps (4a, 4b), which are then moved along said guide rail for spreading out the flat article of clothing in front of a loading end of the conveyor belt; wherein each of the spreading clamps (4a, 4b) comprises a pair of jaws, at least one of them driven for moving between an open position and a closed position; and each of the loading clamps (24a, 24b) comprises a loading support and a loading jaw driven by a first actuator to catch and maintain a proximal portion of one of the corners (A1, A2) of the flat article of clothing against a first side of said loading support, and an auxiliary loading jaw with yielding and recovery capacity to catch and maintain a distal portion of the corner (A1, A2) of the flat article of clothing against an opposite second side of said loading support; and an air blowing nozzle associated to the loading support and arranged for blowing an airflow against the flat article of clothing between said loading jaw and said auxiliary loading jaw, wherein said distal portion of the corner (A1, A2) released from said auxiliary loading jaw is pushed by said airflow and introduced between said pair of jaws of the spreading clamp (4a, 4b) so that it can be caught by the spreading clamp (4a, 4b) before the loading jaw is opened; characterized in that said auxiliary loading jaw is suspended such that it can swing and is pushed by gravity against said opposite second side of the loading support, and the airflow produced by said blowing nozzle is strong enough for making the auxiliary loading jaw yield and thereby releasing the distal portion of the corner (A1, A2) of the flat article of clothing. at least one conveyor belt moving in a loading direction; at least one pair of spreading clamps (4a, 4b) independently driven for moving along a guide rail transverse to said loading direction; and a plurality of loading stations, each provided with a pair of loading clamps (24a, 24b) driven for moving between a loading position, wherein said loading clamps (24a, 24b) are arranged to catch respective contiguous corners (A1, A2) of a flat article of clothing manually loaded by an operator in said loading station, and a delivery position, wherein the loading clamps (24a, 24b) transfer said corners (A1, A2) of said flat article of clothing to said pair of spreading clamps (4a, 4b), which are then moved along said guide rail for spreading out the flat article of clothing in front of a loading end of the conveyor belt; wherein each of the spreading clamps (4a, 4b) comprises a pair of jaws, at least one of them driven for moving between an open position and a closed position; and each of the loading clamps (24a, 24b) comprises a loading support and a loading jaw driven by a first actuator to catch and maintain a proximal portion of one of the corners (A1, A2) of the flat article of clothing against a first side of said loading support, and an auxiliary loading jaw with yielding and recovery capacity to catch and maintain a distal portion of the corner (A1, A2) of the flat article of clothing against an opposite second side of said loading support; and an air blowing nozzle associated to the loading support and arranged for blowing an airflow against the flat article of clothing between said loading jaw and said auxiliary loading jaw, wherein said distal portion of the corner (A1, A2) released from said auxiliary loading jaw is pushed by said airflow and introduced between said pair of jaws of the spreading clamp (4a, 4b) so that it can be caught by the spreading clamp (4a, 4b) before the loading jaw is opened; characterized in that said auxiliary loading jaw is suspended such that it can swing and is pushed by gravity against said opposite second side of the loading support, and the airflow produced by said blowing nozzle is strong enough for making the auxiliary loading jaw yield and thereby releasing the distal portion of the corner (A1, A2) of the flat article of clothing.