A work analysis assistance device, comprising: a pattern acquisition unit configured to acquire a motion pattern when a worker executes work; an evaluation standard setting unit configured to set an evaluation standard for the motion pattern; and a pattern evaluation unit configured to evaluate the motion pattern on the basis of the evaluation standard; a machine control unit configured to control a transport conveyor according to an evaluation result of the pattern evaluation unit by adjusting a transport speed of the transport conveyor; and an input reception unit configured to receive an input of a determination result with respect to acceptability of the work from which the motion pattern is acquired, characterized in that the evaluation standard setting unit is configured to set the evaluation standard for the motion pattern when a certain worker executes certain work according to the number of times of work execution of the certain work executed by the certain worker; the input reception unit is configured to receive the input of the determination result for each of the motion patterns acquired by the pattern acquisition unit; the evaluation standard setting unit is configured to set the evaluation standard by using the motion patterns acquired in the past and the determination result that is received as an input for each of the motion patterns; the evaluation standard setting unit is configured to correct the set evaluation standard in a case where the number of times of work execution is N or more, wherein N is a natural number of 2 or more; the pattern evaluation unit is configured to determine the acceptability of the work from which the motion pattern is acquired in a case where the number of times of work execution is N or more based on the evaluation standard after correction as an evaluation for the motion pattern; and the pattern evaluation unit is configured to determine the acceptability of the work from which the motion pattern is acquired in a case where the number of times of work execution is less than N based on the evaluation standard before correction. a pattern acquisition unit configured to acquire a motion pattern when a worker executes work; an evaluation standard setting unit configured to set an evaluation standard for the motion pattern; and a pattern evaluation unit configured to evaluate the motion pattern on the basis of the evaluation standard; a machine control unit configured to control a transport conveyor according to an evaluation result of the pattern evaluation unit by adjusting a transport speed of the transport conveyor; and an input reception unit configured to receive an input of a determination result with respect to acceptability of the work from which the motion pattern is acquired, characterized in that the evaluation standard setting unit is configured to set the evaluation standard for the motion pattern when a certain worker executes certain work according to the number of times of work execution of the certain work executed by the certain worker; the input reception unit is configured to receive the input of the determination result for each of the motion patterns acquired by the pattern acquisition unit; the evaluation standard setting unit is configured to set the evaluation standard by using the motion patterns acquired in the past and the determination result that is received as an input for each of the motion patterns; the evaluation standard setting unit is configured to correct the set evaluation standard in a case where the number of times of work execution is N or more, wherein N is a natural number of 2 or more; the pattern evaluation unit is configured to determine the acceptability of the work from which the motion pattern is acquired in a case where the number of times of work execution is N or more based on the evaluation standard after correction as an evaluation for the motion pattern; and the pattern evaluation unit is configured to determine the acceptability of the work from which the motion pattern is acquired in a case where the number of times of work execution is less than N based on the evaluation standard before correction.