To allow the quantity and level of filled liquid precisely agree with a prescribed quantity and a prescribed level.

For a liquid contents filling apparatus comprising a filling nozzle turning mechanism 12, a thin bottle carrying table 13, a bottle supply mechanism and a bottle delivery mechanism, each of filling nozzles 17 and each of nozzle guides 18 are provided so as to move, being independent respectively, in the vertical direction, and a guide lane 16 composed of a first stage 16a which raises the nozzle guide 18 to a position making no hindrance to the supply and delivery of the thin bottle, a second stage 16b which is positioned at a level wherefrom the nozzle guide 18 is lowered and put on the mouth of the thin bottle B for centering the thin bottle B to the filling nozzle 17 by the self-weight thereof, and a third stage 16c which is positioned at a level whereto the nozzle guide 18 is raised for a slight distance so that the self-weight of the nozzle guide does not work on the thin bottle B is arranged round the filling nozzle turning mechanism 12.