A filling and packaging machine comprising a web feeding means for feeding out a belt-like web having marks at predetermined intervals; a web folding means for folding the fed-out web in half with an opening facing upward; a plurality of side sealing means provided around the circumference of a rotary body for sealing the web at predetermined intervals in a web-conveying direction to form bags by sandwiching the web, wherein the side sealing means are configured to hold the web; a support member; a hopper shoot attached to the support member and said hopper shoot having a horizontally elongated section in a lower area; a lift means for lifting and lowering the support member; a mark detector for detecting the marks; and a controller for controlling the web-feeding means on the basis of a signal from the mark detector; wherein the hopper shoot is configured such that contents may be filled into the bag while the horizontally elongated section is inserted into the bag; characterised in that the hopper shoot is pivotally attached to the support member so that the hopper shoot is rotatable toward a direction crossing the web-conveying direction of the web between two side sealing means; wherein a tilt angle is formed between a long axis of the horizontally elongated section of the hopper shoot and the web-conveying direction of the web between the side sealing means; wherein the filling and packaging machine is configured such that the tilt angle can be varied in response to a variation in the feed-out quantity of the web from the web-feeding means during a period from the point when the horizontally elongated section of the hopper shoot being inserted through the upper opening into the folded-in-half web until the point when the bag being formed by the side sealing means. a web feeding means for feeding out a belt-like web having marks at predetermined intervals; a web folding means for folding the fed-out web in half with an opening facing upward; a plurality of side sealing means provided around the circumference of a rotary body for sealing the web at predetermined intervals in a web-conveying direction to form bags by sandwiching the web, wherein the side sealing means are configured to hold the web; a support member; a hopper shoot attached to the support member and said hopper shoot having a horizontally elongated section in a lower area; a lift means for lifting and lowering the support member; a mark detector for detecting the marks; and a controller for controlling the web-feeding means on the basis of a signal from the mark detector; wherein the hopper shoot is configured such that contents may be filled into the bag while the horizontally elongated section is inserted into the bag; characterised in that the hopper shoot is pivotally attached to the support member so that the hopper shoot is rotatable toward a direction crossing the web-conveying direction of the web between two side sealing means; wherein a tilt angle is formed between a long axis of the horizontally elongated section of the hopper shoot and the web-conveying direction of the web between the side sealing means; wherein the filling and packaging machine is configured such that the tilt angle can be varied in response to a variation in the feed-out quantity of the web from the web-feeding means during a period from the point when the horizontally elongated section of the hopper shoot being inserted through the upper opening into the folded-in-half web until the point when the bag being formed by the side sealing means.