An earphone device for radiating sound into an acoustic meatus of a user, comprising: a signal-to-sound converter (10; 10A; 10B; 10C; 10D; 10F; 10G; 10J) supplied with an audio signal, and converting said audio signal to inside sound; a sound propagation body (20, 30; 20A, 30A; 20B, 30B; 20C, 30C; 20D, 30D; 20F, 30A; 20G, 30B; 20J, 30J) connected to said signal-to-sound converter, having an inserting portion (30; 30A; 30B; 30C; 30D; 30J) to be inserted into said acoustic meatus, and formed with a sound propagation hole (21; 21B; 21C; 21 D; 21G; 21 J) defined therein and formed in a cylindrical configuration having a centerline for propagating said inside sound from said signal-to-sound converter (10; 10A; 10B; 10C; 10D; 10F; 10G; 10J) to said acoustic meatus and a sound hole (23a; 33; 23-1, 23-2, 23-3, 23-4; 30Ca; 36; 23a, 23aa; 28; 29J) open at one end thereof to an environment; and a switching mechanism (40; 40a; 40B; 40C; 40D; 40E; 40F; 40H; 40J) supported by said sound propagation body (20, 30; 20A, 30A; 20B, 30B; 20C, 30C; 20D, 30D; 20F, 30A; 20G, 30B; 20J, 30J), and changed between open state where the other end portion of said sound hole (23a; 33; 23-1, 23-2, 23-3, 23-4; 30Ca; 36; 23a, 23aa; 28; 29J) is connected to said sound propagation hole (21; 21B; 21C; 21D; 21 G; 21 J) and closing state where said sound hole (23a; 33; 23-1, 23-2, 23-3, 23-4; 30Ca; 36; 23a, 23aa; 28; 29J) is closed therewith, wherein said switching mechanism (40; 40a; 40B; 40C; 40D; 40E; 40F; 40H; 40J) is changed between said open state and said closing state through movements thereof in a direction parallel to the centerline of said sound propagation hole (21; 21B; 21C; 21 D; 21 G; 21 J). a signal-to-sound converter (10; 10A; 10B; 10C; 10D; 10F; 10G; 10J) supplied with an audio signal, and converting said audio signal to inside sound; a sound propagation body (20, 30; 20A, 30A; 20B, 30B; 20C, 30C; 20D, 30D; 20F, 30A; 20G, 30B; 20J, 30J) connected to said signal-to-sound converter, having an inserting portion (30; 30A; 30B; 30C; 30D; 30J) to be inserted into said acoustic meatus, and formed with a sound propagation hole (21; 21B; 21C; 21 D; 21G; 21 J) defined therein and formed in a cylindrical configuration having a centerline for propagating said inside sound from said signal-to-sound converter (10; 10A; 10B; 10C; 10D; 10F; 10G; 10J) to said acoustic meatus and a sound hole (23a; 33; 23-1, 23-2, 23-3, 23-4; 30Ca; 36; 23a, 23aa; 28; 29J) open at one end thereof to an environment; and a switching mechanism (40; 40a; 40B; 40C; 40D; 40E; 40F; 40H; 40J) supported by said sound propagation body (20, 30; 20A, 30A; 20B, 30B; 20C, 30C; 20D, 30D; 20F, 30A; 20G, 30B; 20J, 30J), and changed between open state where the other end portion of said sound hole (23a; 33; 23-1, 23-2, 23-3, 23-4; 30Ca; 36; 23a, 23aa; 28; 29J) is connected to said sound propagation hole (21; 21B; 21C; 21D; 21 G; 21 J) and closing state where said sound hole (23a; 33; 23-1, 23-2, 23-3, 23-4; 30Ca; 36; 23a, 23aa; 28; 29J) is closed therewith, wherein said switching mechanism (40; 40a; 40B; 40C; 40D; 40E; 40F; 40H; 40J) is changed between said open state and said closing state through movements thereof in a direction parallel to the centerline of said sound propagation hole (21; 21B; 21C; 21 D; 21 G; 21 J).