A tennis training apparatus comprising: a sheet supporting frame which can be installed in a proper training place; a hit ball receiving sheet supported by the sheet supporting frame so as to spread in an inclination state rising toward a distal end thereof, wherein the hit ball receiving sheet comprises a hit ball receiving portion and a returning hit ball guiding structure at a lower end of the hit ball receiving portion; and a turning guide portion provided at an upper end of the hit ball receiving sheet said turning guide portion having an eave shape curved in side view toward the hit ball receiving portion, where after a hit ball which has been hit by a player is received by the hit ball receiving sheet, the ball is turned by the turning guide portion to move downward along the hit ball receiving sheet and fly out of the hit ball receiving sheet as a returning hit ball and the returning hit ball bounds on a base face of the training place to return near the player again, and the player can continue a hitting training by hitting the returning ball back again, wherein the hit ball receiving sheet is provided with a returning hit ball guiding structure where the player can select one from some preferable returning-back positions of a guiding portion (331; 332) of the hit ball guiding structure, wherein the returning hit ball guiding structure is a first guiding structure which changes settings of a spreading face of a region of the hit ball receiving sheet near a lower end portion of the hit ball receiving portion to a valley fold to the spread face of the hit ball receiving sheet, and wherein the valley folding of hit ball receiving sheet is provided at a boundary formed between the hit ball receiving portion and the guiding portion of the hit ball receiving sheet as a smooth curved portion without being angulated, and wherein it further comprises guiding stays extending downwardly and being provided at a lower portion of the peripheral frame portion of the sheet supporting frame, the guiding stays being formed with a plurality of adjusting hooks, wherein the valley folding is achieved by pulling downwardly the hit ball receiving sheet utilizing the guiding stays at both left and right side ends of the boundary between the hit ball receiving portion and the guiding portion. a sheet supporting frame which can be installed in a proper training place; a hit ball receiving sheet supported by the sheet supporting frame so as to spread in an inclination state rising toward a distal end thereof, wherein the hit ball receiving sheet comprises a hit ball receiving portion and a returning hit ball guiding structure at a lower end of the hit ball receiving portion; and a turning guide portion provided at an upper end of the hit ball receiving sheet said turning guide portion having an eave shape curved in side view toward the hit ball receiving portion, where after a hit ball which has been hit by a player is received by the hit ball receiving sheet, the ball is turned by the turning guide portion to move downward along the hit ball receiving sheet and fly out of the hit ball receiving sheet as a returning hit ball and the returning hit ball bounds on a base face of the training place to return near the player again, and the player can continue a hitting training by hitting the returning ball back again, wherein the hit ball receiving sheet is provided with a returning hit ball guiding structure where the player can select one from some preferable returning-back positions of a guiding portion (331; 332) of the hit ball guiding structure, wherein the returning hit ball guiding structure is a first guiding structure which changes settings of a spreading face of a region of the hit ball receiving sheet near a lower end portion of the hit ball receiving portion to a valley fold to the spread face of the hit ball receiving sheet, and wherein the valley folding of hit ball receiving sheet is provided at a boundary formed between the hit ball receiving portion and the guiding portion of the hit ball receiving sheet as a smooth curved portion without being angulated, and wherein it further comprises guiding stays extending downwardly and being provided at a lower portion of the peripheral frame portion of the sheet supporting frame, the guiding stays being formed with a plurality of adjusting hooks, wherein the valley folding is achieved by pulling downwardly the hit ball receiving sheet utilizing the guiding stays at both left and right side ends of the boundary between the hit ball receiving portion and the guiding portion.