An inspection apparatus for a sensor element for use in a gas sensor, comprising: a plurality of chambers each of which is a substantially cylindrical member having an opening part opening to the outside at one end thereof and a bottomed end part at the other end thereof, one sensor element being inserted into each of said plurality of chambers; a gas supply element which supplies a predetermined inspection gas to each of said plurality of chambers; a plurality of flow rate adjusting elements each respectively corresponding to each of said plurality of chambers, each of said plurality of flow rate adjusting elements being operable to individually control a flow rate of said predetermined inspection gas in each of said plurality of chambers; and a measuring element which is electrically connected to a sensor element inserted into each of said plurality of chambers, and performs a predetermined electrical measurement, wherein each of said plurality of chambers includes: an element insertion/extraction part into which and from which said sensor element is inserted and extracted; a gas introduction part to which a supply port for said predetermined inspection gas supplied from said gas supply element is connected; and a tapered part being a tapered space connecting said element insertion/extraction part to said gas introduction part, said element insertion/extraction part being a substantially tubular space continuous from said opening part of the chamber, said gas introduction part being a substantially tubular space continuously extending from said tapered part to a bottom portion of said chamber, the inner diameter of said element insertion/extraction part being smaller than the inner diameter of said gas introduction part, a cross-section surface of said tapered part sectioned perpendicularly to a lengthwise direction of said chamber becoming larger from the side of said element insertion/extraction part toward the side of said gas introduction part. a plurality of chambers each of which is a substantially cylindrical member having an opening part opening to the outside at one end thereof and a bottomed end part at the other end thereof, one sensor element being inserted into each of said plurality of chambers; a gas supply element which supplies a predetermined inspection gas to each of said plurality of chambers; a plurality of flow rate adjusting elements each respectively corresponding to each of said plurality of chambers, each of said plurality of flow rate adjusting elements being operable to individually control a flow rate of said predetermined inspection gas in each of said plurality of chambers; and a measuring element which is electrically connected to a sensor element inserted into each of said plurality of chambers, and performs a predetermined electrical measurement, wherein each of said plurality of chambers includes: an element insertion/extraction part into which and from which said sensor element is inserted and extracted; a gas introduction part to which a supply port for said predetermined inspection gas supplied from said gas supply element is connected; and a tapered part being a tapered space connecting said element insertion/extraction part to said gas introduction part, an element insertion/extraction part into which and from which said sensor element is inserted and extracted; a gas introduction part to which a supply port for said predetermined inspection gas supplied from said gas supply element is connected; and a tapered part being a tapered space connecting said element insertion/extraction part to said gas introduction part, said element insertion/extraction part being a substantially tubular space continuous from said opening part of the chamber, said gas introduction part being a substantially tubular space continuously extending from said tapered part to a bottom portion of said chamber, the inner diameter of said element insertion/extraction part being smaller than the inner diameter of said gas introduction part, a cross-section surface of said tapered part sectioned perpendicularly to a lengthwise direction of said chamber becoming larger from the side of said element insertion/extraction part toward the side of said gas introduction part.