The present disclosure provides a planetary gear train of an automatic transmission including: input and output shafts, first to fifth planetary gear sets respectively having first to third, fourth to sixth, seventh to ninth, tenth to twelfth, and thirteenth to fifteenth rotational elements, a first shaft connected with the second and fifth rotational elements and the input shaft, a second shaft connected with the fourteenth rotational element and the output shaft, a third shaft connected with the ninth and thirteenth rotational elements, a fourth shaft connected with the tenth and fifteenth rotational elements, a fifth shaft connected with the first, sixth, and seventh rotational elements, a sixth shaft connected with the third rotational element, a seventh shaft connected with the eighth and eleventh rotational element, an eighth shaft connected with the fourth rotational element, and a ninth shaft connected with the twelfth rotational element.