Provided is a strain permitting genetic engineering of green sulfur bacteria that synthesize bacteriochlorophyll e; isolated green sulfur bacterium Chlorobaculum limnaeum strain RK-j-1 with accession number NITE BP-1202; isolated transformed Chlorobaculum limnaeum strain obtained by transformation of strain RK-j-1, preferably Chlorobaculum limnaeum dbchU strain with accession number NITE BP-1203 wherein bchU gene is disrupted; a production method of bacteriochlorophyll f containing a step of cultivating Chlorobaculum limnaeum strain dbchU; and bacteriochlorophyll f obtained by the aforementioned production method.