A work machine comprising: a tape feeder (86, 88) provided with taped components (100, 120), consisting of taped lead components (102, 122) having multiple leads (107, 108, 127, 128), in an extended manner to extent on the tape feeder (86, 88) and configured to supply the lead components (102, 122) in a state of being detached from the taped components (100, 120) extended to a supply position; a mounting head (60, 62) configured to mount the lead components (102, 122) supplied by the tape feeder (86, 88) onto a board; an imaging device; and a control device, wherein the control device includes: an imaging section configured to image an identification object (110, 130) with the imaging device, the identification object (110, 130) being written on the taped components (100, 120) extended on the tape feeder (86, 88) and capable of identifying the polarity of each of the multiple leads (107, 108, 127, 128), and a determination section configured to determine whether an actual polarity disposition, which is the polarity disposition of each of the multiple leads (107, 108, 127, 128) in the taped components (100, 120) extended on the tape feeder (86, 88), and a set polarity disposition, which is the polarity disposition of each of the multiple leads (107, 108, 127, 128) set in advance, match each other based on image data obtained by imaging with the imaging section characterized by: a detection device (116, 136) configured to detect a splicing point of the taped components (100, 120), and the control device including a controller connected to the detection device (116, 136) and the imaging section, wherein the controller is configured to cause the imaging section to image the identification object (110, 130) positioned closest to the splicing point with the imaging device downstream from the splicing point detected by the detection device (116, 136). a tape feeder (86, 88) provided with taped components (100, 120), consisting of taped lead components (102, 122) having multiple leads (107, 108, 127, 128), in an extended manner to extent on the tape feeder (86, 88) and configured to supply the lead components (102, 122) in a state of being detached from the taped components (100, 120) extended to a supply position; a mounting head (60, 62) configured to mount the lead components (102, 122) supplied by the tape feeder (86, 88) onto a board; an imaging device; and a control device, wherein the control device includes: an imaging section configured to image an identification object (110, 130) with the imaging device, the identification object (110, 130) being written on the taped components (100, 120) extended on the tape feeder (86, 88) and capable of identifying the polarity of each of the multiple leads (107, 108, 127, 128), and a determination section configured to determine whether an actual polarity disposition, which is the polarity disposition of each of the multiple leads (107, 108, 127, 128) in the taped components (100, 120) extended on the tape feeder (86, 88), and a set polarity disposition, which is the polarity disposition of each of the multiple leads (107, 108, 127, 128) set in advance, match each other based on image data obtained by imaging with the imaging section characterized by: a detection device (116, 136) configured to detect a splicing point of the taped components (100, 120), and the control device including a controller connected to the detection device (116, 136) and the imaging section, wherein the controller is configured to cause the imaging section to image the identification object (110, 130) positioned closest to the splicing point with the imaging device downstream from the splicing point detected by the detection device (116, 136). an imaging section configured to image an identification object (110, 130) with the imaging device, the identification object (110, 130) being written on the taped components (100, 120) extended on the tape feeder (86, 88) and capable of identifying the polarity of each of the multiple leads (107, 108, 127, 128), and a determination section configured to determine whether an actual polarity disposition, which is the polarity disposition of each of the multiple leads (107, 108, 127, 128) in the taped components (100, 120) extended on the tape feeder (86, 88), and a set polarity disposition, which is the polarity disposition of each of the multiple leads (107, 108, 127, 128) set in advance, match each other based on image data obtained by imaging with the imaging section characterized by: a detection device (116, 136) configured to detect a splicing point of the taped components (100, 120), and the control device including a controller connected to the detection device (116, 136) and the imaging section, wherein the controller is configured to cause the imaging section to image the identification object (110, 130) positioned closest to the splicing point with the imaging device downstream from the splicing point detected by the detection device (116, 136). a detection device (116, 136) configured to detect a splicing point of the taped components (100, 120), and the control device including a controller connected to the detection device (116, 136) and the imaging section, wherein the controller is configured to cause the imaging section to image the identification object (110, 130) positioned closest to the splicing point with the imaging device downstream from the splicing point detected by the detection device (116, 136).