Abstract: A method for culturing cells or microorganisms by dissolving oxygen or carbon dioxide in a culture solution containing a nutrient including: supplying gas containing oxygen or carbon dioxide into inside of a glass porous body being configured to have cylindrical shape and a large number of uniformly fine pores in the outer surface and being configured to seal the end of the glass porous body; generating bubbles that have a 50% diameter of 200 ?m or less in a volume-based particle size distribution from the outer surface of the porous body by using gas containing oxygen or carbon dioxide that is supplied from an unsealed end of the glass porous body; suppressing aggregation of the bubbles by at least one of a cell-protecting agent for protecting the cells and a protein hydrolysate included in the culture solution; and dissolving oxygen or carbon dioxide in the culture solution.