A culture chamber for cultivating a culture object by using a culture liquid, comprising: a main body part constituted by a cylindrical body; a culture space part that is formed in said main body part and that houses said culture object together with said culture liquid; a blockading plate (6, 8) that is fixed to said main body part by a bolt, said blockading plate (6, 8) opening or closing said culture space part; an introducing part that is formed in said main body part, an opening diameter of said introducing part narrowing toward a nozzle hole portion from a large-diameter hole portion, said introducing part being arranged to introduce said culture liquid into said culture space part; a discharging part that is formed in said main body part, said discharging part being arranged to discharge said culture liquid introduced from said introducing part, from a location opposing said introducing part; and a flow arrangement part (40, 44, 46, 48) that is formed in a side of said introducing part of said culture space part, said flow arrangement part (40, 44, 46, 48) diffusing said culture liquid, which is introduced from said introducing part into said culture space part, from an inner wall surface (13, 15) of said culture space part toward a direction intersecting a virtual line connecting said introducing part to said discharging part, said flow arrangement part (40, 44, 46, 48) causing said culture liquid to form a liquid flow to said discharging part; wherein said culture space part includes a first inner wall surface formed in said main body part and a second inner wall surface (13, 15) formed on said blockading plate (6, 8), said first inner wall surface forming a curved surface, said second inner wall surface (13, 15) forming a flat surface formed in a direction that intersects said first inner wall surface, said culture space part being cylindrically formed; wherein said flow arrangement part (40, 44, 46, 48) includes a wall part that is provided at a front part of said nozzle hole portion of said introducing part, a space part that is formed between said wall part and said introducing part, said space part being surrounded by said wall part and said first inner wall surface of said culture space part, and a slit (46, 48) that is formed between said wall part and said second inner wall surface (13, 15) of said culture space part; and wherein said flow arrangement part (40, 44, 46, 48) reduces the flow velocity of said culture liquid introduced from said introducing part into said culture space part, in said space part by said wall part, said flow arrangement part (40, 44, 46, 48) causing said culture liquid to flow along said second inner wall surface (13, 15) of said culture space part by said wall part and said slit (46, 48). a main body part constituted by a cylindrical body; a culture space part that is formed in said main body part and that houses said culture object together with said culture liquid; a blockading plate (6, 8) that is fixed to said main body part by a bolt, said blockading plate (6, 8) opening or closing said culture space part; an introducing part that is formed in said main body part, an opening diameter of said introducing part narrowing toward a nozzle hole portion from a large-diameter hole portion, said introducing part being arranged to introduce said culture liquid into said culture space part; a discharging part that is formed in said main body part, said discharging part being arranged to discharge said culture liquid introduced from said introducing part, from a location opposing said introducing part; and a flow arrangement part (40, 44, 46, 48) that is formed in a side of said introducing part of said culture space part, said flow arrangement part (40, 44, 46, 48) diffusing said culture liquid, which is introduced from said introducing part into said culture space part, from an inner wall surface (13, 15) of said culture space part toward a direction intersecting a virtual line connecting said introducing part to said discharging part, said flow arrangement part (40, 44, 46, 48) causing said culture liquid to form a liquid flow to said discharging part; wherein said culture space part includes a first inner wall surface formed in said main body part and a second inner wall surface (13, 15) formed on said blockading plate (6, 8), said first inner wall surface forming a curved surface, said second inner wall surface (13, 15) forming a flat surface formed in a direction that intersects said first inner wall surface, said culture space part being cylindrically formed; wherein said flow arrangement part (40, 44, 46, 48) includes a wall part that is provided at a front part of said nozzle hole portion of said introducing part, a space part that is formed between said wall part and said introducing part, said space part being surrounded by said wall part and said first inner wall surface of said culture space part, and a slit (46, 48) that is formed between said wall part and said second inner wall surface (13, 15) of said culture space part; and wherein said flow arrangement part (40, 44, 46, 48) reduces the flow velocity of said culture liquid introduced from said introducing part into said culture space part, in said space part by said wall part, said flow arrangement part (40, 44, 46, 48) causing said culture liquid to flow along said second inner wall surface (13, 15) of said culture space part by said wall part and said slit (46, 48).