An object of the present invention is to provide a flow type reaction device which is capable of maintaining reaction efficiency and productivity which are sufficient for practical use for a long time, and reducing the size and cost of the reaction device, and the present invention provides a flow type reaction device (1) for continuously reacting two or more kinds of raw materials, including a mixing section (10) which is configured to mix two or more kinds of the raw materials, and a reaction section (20) which is provided on a secondary side with respect to the mixing section (10), and configured to obtain a product by reacting two or more kinds of the raw materials, the mixing section (10) includes a mixing device (13) which is configured to mix two or more kinds of the raw materials, and two or more supply pipes (L11, L12) which are configured to supply each of two or more kinds of the raw materials to the mixing device (13), the supply pipes (L11, L12) are respectively connected to the mixing device (13), and at least one of the supply pipes (L11) has, in the vicinity of a connection portion of the supply pipe (L11) with the mixing device (13), a suppression mechanism which is configured to suppress movement of a fluid from the mixing device (13) to the supply pipe (L11).

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