A sound collection loudspeaker apparatus mounted on a vehicle in which at least a first sound collection and amplification position and a second sound collection and amplification position is assumed to be located inside the vehicle, the sound collection loudspeaker apparatus comprising: a first noise level estimating part (101F, 301F) configured to obtain a first noise level which is an estimated value of a magnitude of a noise component included in a first sound collection signal obtained from a first microphone which collects sound emitted from the first sound collection and amplification position; a second noise level estimating part (101R, 301R) configured to obtain a second noise level which is an estimated value of a magnitude of a noise component included in a second sound collection signal obtained from a second microphone which collects sound emitted from the second sound collection and amplification position; a suppression amount setting part configured to obtain a ratio of a reproduced noisy sound level, which is an estimated value of a magnitude of noise at a position of a passenger at the second sound collection and amplification position in a case where the first noise level is reproduced from a second speaker placed at the second sound collection and amplification position, to a second noisy sound level, which is an estimated value of a magnitude of noise corresponding to the second noise level at the position of the passenger at the second sound collection and amplification position, obtain a noise suppression amount such that a product of the ratio and the noise suppression amount equals a predetermined constant, and set the noise suppression amount at 1 in a case where the noise suppression amount is greater than 1; and a noise suppressing part configured to multiply the first sound collection signal by the noise suppression amount and output a multiplication result to the second speaker placed at the second sound collection and amplification position, wherein the reproduced noisy sound level is obtained by multiplying the first noise level by a constant obtained in advance, and the second noisy sound level is obtained by multiplying the second noise level by a constant obtained in advance. a first noise level estimating part (101F, 301F) configured to obtain a first noise level which is an estimated value of a magnitude of a noise component included in a first sound collection signal obtained from a first microphone which collects sound emitted from the first sound collection and amplification position; a second noise level estimating part (101R, 301R) configured to obtain a second noise level which is an estimated value of a magnitude of a noise component included in a second sound collection signal obtained from a second microphone which collects sound emitted from the second sound collection and amplification position; a suppression amount setting part configured to obtain a ratio of a reproduced noisy sound level, which is an estimated value of a magnitude of noise at a position of a passenger at the second sound collection and amplification position in a case where the first noise level is reproduced from a second speaker placed at the second sound collection and amplification position, to a second noisy sound level, which is an estimated value of a magnitude of noise corresponding to the second noise level at the position of the passenger at the second sound collection and amplification position, obtain a noise suppression amount such that a product of the ratio and the noise suppression amount equals a predetermined constant, and set the noise suppression amount at 1 in a case where the noise suppression amount is greater than 1; and a noise suppressing part configured to multiply the first sound collection signal by the noise suppression amount and output a multiplication result to the second speaker placed at the second sound collection and amplification position, wherein the reproduced noisy sound level is obtained by multiplying the first noise level by a constant obtained in advance, and the second noisy sound level is obtained by multiplying the second noise level by a constant obtained in advance.