FLOW PASSAGE MODULE AND CELL CULTURE APPARATUS USING SAME

Provided are a flow passage module which can achieve complete liquid substitution in a circulating flow passage with a simple structure, and a cell culture apparatus using said flow passage module. Aflow passage module 1 comprises: a flexible branching section 2 which is provided with a first branching flow passage 2a connected with an inflow passage 4 for a fluid, a second branching flow passage2b connected with an outflow passage 5, a third branching flow passage 2c connected with an entry-side end part 6a of a circulating flow passage 6, and a fourth branching flow passage 2d connected with an exit-side end part 6b of the circulating flow passage 6, and which enables the branching flow passages to be communicated with each other; and a communication state switching part 3 which has opening/closing members (3a, 3b) for closing and opening the desired branching flow passage from among the plurality of branching flow passages, and which switches between a first communication state inwhich the third branching