Running machine

A running machine, comprising:

• a lower support having side frames;
• an endless belt provided between said side frames, having an upper surface on which a user can run;
• a running plate inserted into said endless belt having a seating surface coming into sliding contact with a lower surface of an upper portion of the endless belt;
• a driving roller for rotating the endless belt mounted in an inner portion of a frontal end of the endless belt;
• and
• a sliding member for guiding the rotational movement of the endless belt mounted in an inner portion of a rear end of the endless belt;
• and
• a driving unit for rotating the driving roller, and
• a tensioning member mounted near the driving roller, said tensioning member depressing the upper portion of the endless belt toward a lower portion thereof,
• wherein said sliding member for guiding the rotational movement of the endless belt is formed to nave a thickness smaller than a diameter of said driving roller, and
• wherein the upper portion of the endless belt is depressingly lowered by the tensioning member toward the lower end thereof so that the distance between the upper portion and the lower portion of the endless belt defined between the sliding member and the tensioning member is smaller than the diameter of the driving roller.