The present invention relates to a foreign material backflow blocking straw and a foreign material backflow blocking device with the same, more specifically, to a foreign material backflow blocking straw and a foreign material backflow blocking device with the same including an inlet into which a beverage to be stored in a container flows; an outlet towards which the beverage having come in via the inlet flows; a foreign material discharging hole formed between the inlet and the outlet and discharging some of the beverage flowing back from the outlet to the inlet; and a guiding shied which is located at the point of intersection of the inlet, the outlet, and the foreign material discharging hole, connects the inlet to the outlet upon the entry of the beverage, and connects the outlet to the foreign material discharging hole when some of the beverage flows backwards. The foreign material backflow blocking straw and the foreign material backflow blocking device with the same according to the present invention i
